Blueberry Crumb Cake is a beloved classic that promises pure indulgence. Imagine a sensationally light and fluffy cake, generously studded with vibrant fresh or frozen blueberries, all harmoniously complemented by an irresistible, crunchy cinnamon streusel topping. This isn’t just any cake; it’s the BEST blueberry coffee cake you could ask for, making it an ideal choice for a special breakfast, a leisurely brunch, or a comforting dessert. Its delightful combination of textures and flavors guarantees a memorable treat for any occasion.

Blueberry Crumb Cake: A Brunch Favorite

If your heart beats for the tender crumb and fruity burst of blueberry muffins, then prepare to fall head over heels for this magnificent blueberry crumb cake, affectionately known as a coffee cake. This delightful pastry effortlessly combines the best elements of a sweet breakfast treat with the comforting essence of a homemade dessert, making it a versatile star on any table.

American coffee cakes hold a special place in culinary traditions across the United States, and there’s one glorious element that consistently steals the show: the streusel. This magical, crunchy crumb topping, crafted from a simple yet perfect blend of flour, sugar, aromatic cinnamon, and rich butter, is an absolute favorite for countless palates. It’s the textural counterpoint that elevates a good cake to an extraordinary one, providing a satisfying crunch that contrasts beautifully with the soft cake beneath.

The streusel’s placement is key to its charm. It can be generously sprinkled solely on top, forming a golden, inviting crust. Alternatively, for an added layer of delight and visual appeal, it can be artfully layered into the middle of the cake as well, creating a dual-streusel experience, much like my popular sour cream coffee cake. This double layer ensures that every bite offers that coveted textural excitement.

The cake itself is designed to be perfectly balanced, not overly sweet. This intentional moderation allows the streusel to shine, adding that essential layer of sweetness and an unparalleled crunchy texture that defines the coffee cake experience. It’s a symphony of flavors and textures, where each component plays a vital role in creating a harmonious whole.

While some coffee cakes might feature a delicate drizzle of icing, this particular recipe often finds it unnecessary. The inherent sweetness and satisfying texture provided by the robust streusel topping are more than sufficient, effectively eliminating the need for any additional glaze. This simplicity highlights the pure, unadulterated flavors of the blueberries and the crumb, ensuring nothing detracts from its natural deliciousness.

It’s an interesting historical note that despite their name, not all coffee cakes actually contain coffee as an ingredient. The name rather signifies their traditional role as a perfect accompaniment to a cup of coffee, or as a delightful feature of breakfast and brunch spreads. They are designed to be enjoyed leisurely, offering comfort and flavor in equal measure.

The Secret to a Perfect Blueberry Coffee Cake

This exceptional blueberry coffee cake boasts an incredibly light, fluffy, moist, and tender crumb, largely due to the inclusion of buttermilk. Buttermilk’s acidity reacts with the baking powder, creating air pockets that result in a wonderfully airy texture. If buttermilk isn’t readily available, don’t fret! You can easily create a suitable substitute by making sour milk: simply add a tablespoon of vinegar or lemon juice to regular milk and let it sit for 5-10 minutes until it slightly curdles. (Detailed instructions are provided in the recipe notes below.) This simple trick ensures your cake will always achieve that desired tender consistency.

The streusel, a cornerstone of this recipe, is crafted to be wonderfully thick and crunchy, infused with a delicate hint of cinnamon. For those who adore a more pronounced spice, feel free to increase the amount of cinnamon to taste. The contrast between the soft cake and the crisp, buttery streusel is what makes each bite truly captivating.

When it comes to blueberries, both fresh or frozen blueberries perform beautifully in this recipe. If you opt for frozen blueberries, a helpful tip to prevent them from “bleeding” their color into the batter – which can sometimes result in a greenish hue – is to sprinkle them directly on top of the cake batter just before adding the streusel. This keeps their vibrant blue contained. Alternatively, if you prefer to fold them into the batter, be sure to rinse them under cold water until the water runs clear, then gently pat them thoroughly dry. You can even toss them with a tablespoon of flour as an extra measure to minimize bleeding and help them suspend better in the batter, ensuring even distribution throughout your delightful cake.

Crafting the Perfect Streusel Topping

To begin your journey to a truly magnificent blueberry crumb cake, your first step is to prepare the star of the show: the streusel topping. This is a crucial early stage because you’ll want to refrigerate the streusel until you’re ready to assemble the cake. This vital step serves two important purposes: it prevents the butter within the streusel from melting prematurely before the cake enters the oven, and it ensures the streusel retains its distinct crumbly texture, preventing it from fully dissolving into the cake batter as it bakes. This guarantees those delightful crunchy pockets that make crumb cake so special.

To make the streusel, gather your essential ingredients: all-purpose flour, granulated sugar, a hint of fragrant cinnamon, and cold butter. Place all these ingredients into a medium-sized mixing bowl. The cold butter is essential here as it helps create those coveted crumbs.

Next, you’ll need to incorporate the butter into the dry ingredients. You can achieve this using a pastry blender or a sturdy fork, cutting the butter into smaller pieces and blending it with the flour, sugar, and cinnamon. Alternatively, for a more hands-on approach, you can simply rub the mixture together with your fingertips. Use a gentle, quick motion to break down the butter into pea-sized crumbs and incorporate it thoroughly with the dry ingredients. Continue until the butter is fully integrated into the mixture.

The ideal consistency of your streusel should feature some fine crumbs, but importantly, it should also be able to clump together when gently squeezed in your hands. This indicates the perfect balance for a crumbly yet substantial topping. Once achieved, place the streusel mixture in the refrigerator to chill until you are ready to complete the assembly of your delectable blueberry crumb cake.

Preparing the Luscious Cake Batter

For the foundation of this exquisite cake, you will need a selection of basic yet essential baking ingredients:

• All-Purpose Flour: The structural base of our cake.
• Baking Powder: The primary leavening agent, responsible for the cake’s light and airy rise.
• Salt: Essential for balancing and enhancing all the flavors in the cake.
• Unsalted Butter: Softened to perfection, it adds richness and tenderizes the crumb.
• Granulated Sugar: Sweetens the cake and contributes to its moistness and golden crust.
• Large Eggs: Act as binders, add moisture, and contribute to the cake’s structure.
• Vanilla Extract: A timeless flavor enhancer, adding warmth and depth.
• Buttermilk: Key for a tender, moist, and slightly tangy crumb. (If unavailable, see recipe notes for a homemade substitute using milk with vinegar or lemon juice.)
• Fresh or Frozen Blueberries: The star fruit, bringing bursts of juicy sweetness and beautiful color.

Step-by-Step: How to Make Blueberry Crumb Cake

Creating this delightful blueberry crumb cake is a straightforward process, but paying attention to each step ensures a perfect outcome. Begin by sifting the dry ingredients into a bowl. This crucial step helps to aerate the flour and ensures a thoroughly mixed combination of baking powder and salt, preventing lumps and ultimately contributing to a remarkably light and tender crumb. If you don’t possess a fine-mesh sieve, a good alternative is to whisk the ingredients vigorously for at least 30 seconds to incorporate as much air as possible, achieving a similar effect.

1. In the bowl of a stand mixer fitted with the paddle attachment, cream the softened butter and granulated sugar together. Beat on medium-high speed for 3-5 minutes until the mixture becomes visibly light in color and notably fluffy in texture. This process incorporates air, essential for a tender cake.
2. Next, incorporate the large eggs one at a time. Add the first egg, mix until just combined, then add the second. This allows the eggs to emulsify properly with the butter-sugar mixture, creating a smooth batter.
3. Pour in the vanilla extract. Mix briefly until fragrant and evenly distributed throughout the batter. After mixing, take a moment to scrape down the sides and bottom of the bowl with a rubber spatula to ensure all ingredients are thoroughly combined and no pockets of unmixed ingredients remain.
4. Now, it’s time to introduce the dry ingredients. Add approximately HALF of the sifted dry ingredients to the wet mixture. Mix on low speed until they are just incorporated. Be careful not to overmix at this stage; overmixing can develop the gluten in the flour, leading to a tough cake.
5. Following the dry ingredients, add all of the buttermilk to the batter. Mix on low speed until it is just incorporated. The batter may appear slightly curdled or separated at first, but it will come together.
6. Finally, add the remaining dry ingredients. Mix on the lowest speed until the flour streaks have just disappeared and the batter is smooth. It is critical at this stage to avoid overmixing. A few small lumps are preferable to a dense, chewy cake. Stop mixing as soon as the ingredients are combined.

*Refer to the helpful step-by-step photos below for visual guidance during the mixing process, ensuring you hit all the right consistencies.

Incorporating the Bursts of Blueberry Flavor

Blueberries are the star of this crumb cake, and how you add them can make a difference in the final appearance and texture of your cake.

If you are using fresh blueberries, simply fold them into the prepared cake batter very gently with a spatula. This gentle motion helps prevent them from bursting and coloring the batter too much, maintaining their distinct form and juicy pop.

When working with frozen blueberries, you have a couple of excellent options to ensure the best results. One effective method is to layer them directly on top of the cake batter once it’s spread into the pan, just before you sprinkle on the streusel. This approach is fantastic for preventing any potential color bleeding into the batter, keeping your cake’s crumb beautifully golden. The blueberries will thaw and release their juices during baking, creating delightful pockets of fruit.

Alternatively, if you prefer to fold frozen blueberries into the batter, take these steps: First, rinse the frozen blueberries thoroughly in a colander under cold running water until the water coming out runs completely clear. This washes away any excess ice crystals and prevents the color from bleeding as much. Next, gently but thoroughly pat them dry with paper towels. For an extra measure of protection against bleeding and to help the blueberries suspend more evenly throughout the batter (preventing them from sinking to the bottom), you may even toss them with one tablespoon of all-purpose flour before folding them into the cake batter. Always fold gently to preserve the berries’ integrity and avoid overmixing.

Assembling Your Magnificent Blueberry Crumb Cake

With both your luscious cake batter and perfectly chilled streusel ready, it’s time to bring everything together for baking. This assembly phase is quick and easy, setting the stage for a truly impressive final product.

First, take your prepared blueberry cake batter and spread it evenly into a generously greased 9×9-inch square baking pan. Ensure the batter forms a smooth, consistent layer across the bottom of the pan. A light coating of non-stick baking spray with flour (like Baker’s Joy) works wonders here to prevent sticking and ensure easy removal later.

Next, retrieve your chilled streusel topping from the refrigerator. Now, with a flourish, sprinkle the streusel generously and evenly over the entire surface of the cake batter. For an extra touch of rustic charm and varied texture, I like to gently squeeze some of the streusel in my hands before sprinkling. This technique creates some beautifully substantial, large clumps of streusel, alongside the finer sandy crumbs, ensuring a delightful mix of textures in every single bite. Distribute it over the entire surface, ensuring no part of the cake is left without this golden, crunchy crown.

Essential Baking Tips for a Perfect Crumb Cake

Baking this blueberry crumb cake to perfection requires a keen eye and understanding of doneness, especially with that generous streusel topping. Here are some key tips to ensure your cake turns out beautifully:

Bake your blueberry crumb cake in a preheated oven at 375 degrees Fahrenheit for approximately 45-55 minutes. If you are using frozen blueberries, you might find the baking time extends slightly, possibly up to around 60 minutes. The critical indicator of doneness for this cake is not necessarily a clean toothpick, but rather when the center of the cake springs back when gently touched. It should feel firm to the touch and not jiggle, indicating that the batter has fully set. It’s crucial not to over-bake, as this can lead to a dry cake.

Keep a close watch on the streusel topping during the final stages of baking. If you notice the top browning quicker than the center of the cake is baking through, you may need to delicately cover the top with a loose piece of aluminum foil. This acts as a shield, preventing the streusel from burning while allowing the cake to continue baking evenly underneath.

A common challenge with crumb cakes is judging doneness with a toothpick. Unfortunately, the streusel layer can often scrape off onto the toothpick, making it appear clean even if the cake’s center is still underbaked and gooey. For this particular cake, rely more on the “touch test.” Carefully and gently press the center of the cake with a clean finger; if it springs back and feels set, it’s done. Just be cautious not to burn yourself when performing this test.

Storage and Serving Suggestions

Proper storage ensures your delicious blueberry coffee cake remains fresh and delightful for days. This cake is quite resilient and can be stored at room temperature for up to 5 days. The simplest method is to leave the cake directly in its baking pan and ensure the pan is tightly covered with aluminum foil or plastic wrap. This barrier prevents air from drying out the cake and keeps it moist. Alternatively, if you prefer, you can transfer individual slices or the entire cooled cake to an airtight container. This helps maintain its freshness and protects the delicate streusel topping.

This blueberry crumb cake recipe, with its fruity sweetness and that irresistible crunchy streusel topping, is truly a joy to behold and to eat. It pairs wonderfully with a fresh cup of coffee or tea, making it an ideal companion for a peaceful morning or a relaxing afternoon. For an extra touch of decadence, consider serving it slightly warm with a dollop of whipped cream or a scoop of vanilla ice cream. However you choose to enjoy it, this cake is sure to bring smiles. Enjoy every crumb!

More Irresistible Coffee Cake Recipes

If you’ve fallen in love with the comforting charm of this Blueberry Crumb Cake, then you’ll be thrilled to explore other delightful variations. Coffee cakes are incredibly versatile, offering a range of flavors and textures to suit any craving. Expand your baking repertoire with these equally tempting recipes:

• Pumpkin Spice Coffee Cake: Perfect for autumn, boasting warm spices and a cozy flavor.
• Coffee Cake Banana Bread: A delightful fusion of two beloved classics, combining moist banana bread with a sweet crumb topping.
• Irish Apple Cake: A rustic, fruit-filled cake that’s wonderful with a dollop of cream.
• Coffee Cake Muffins: All the flavor of coffee cake in a convenient, portable muffin form.
• Classic 9×13 Coffee Cake: A larger format, perfect for feeding a crowd with its traditional flavor.
• Cinnamon Chip Coffee Cake: Featuring delightful cinnamon chips for an extra burst of spice and sweetness.

Average Rating: 4.32 from 38 ratings

Blueberry Crumb Cake Recipe

Created by
Amber Brady

Prep:
20 mins

Cook:
55 mins

Total:
1 hr 15 mins

A light and fluffy cake loaded with blueberries and topped with sweet and crunchy streusel.

Pin Recipe

Yields

9
Servings

Ingredients

Cake:

• 2 cups (240 g) all-purpose flour, (stir, spoon, & level)
• 2 tsp baking powder
• ½ tsp salt
• ½ cup (113 g) butter, (1 stick) softened
• 1 cup (200 g) granulated sugar
• 2 large eggs
• 1 tsp vanilla extract
• 1 cup (237 g) buttermilk*
• 2 cups (280 g) blueberries, rinsed and dried

Streusel:

• ⅔ cup (80 g) all-purpose flour
• ⅔ cup (134 g) granulated sugar
• ¼ tsp ground cinnamon
• 6 Tbsp (85 g) butter, cold

Equipment

• 9-inch square baking dish
• KitchenAid 5-Qt. Stand Mixer
• Fine Mesh Strainer/Sieve

Instructions

1. Preheat oven to 375 degrees Fahrenheit (190°C). Grease a 9×9-inch baking pan thoroughly. (Using a baking spray with flour, like Baker’s Joy, is recommended for easy release.) Set aside.
2. For the streusel: In a medium bowl, combine the flour, granulated sugar, ground cinnamon, and cold butter. Use a pastry blender or a fork to cut the butter into the dry ingredients. Alternatively, you can use your fingertips to rub the mixture together until the butter is incorporated and the mixture resembles coarse crumbs with some larger pea-sized clumps. (The streusel should be able to clump together when squeezed in your hand.) Refrigerate the streusel while you prepare the cake batter to keep the butter firm.
3. For the cake: In a separate large bowl, sift together the all-purpose flour, baking powder, and salt. Sifting helps aerate the dry ingredients and ensures a light, tender cake. Set this bowl aside.
4. In the bowl of a stand mixer fitted with the paddle attachment (or using a hand mixer), cream the softened butter and granulated sugar together on medium-high speed. Beat for 3-5 minutes until the mixture is light in color and fluffy in texture.
5. Add the large eggs one at a time, mixing well after each addition until fully incorporated. Then, mix in the vanilla extract. Scrape down the sides and bottom of the bowl with a rubber spatula to ensure everything is well combined.
6. Add approximately half of the reserved dry ingredients to the wet mixture. Mix on low speed until just incorporated, being careful not to overmix.
7. Pour in all of the buttermilk. Mix on low speed until just incorporated. The batter might look slightly curdled at this point, which is normal.
8. Add the remaining dry ingredients. Mix on low speed until just incorporated and no streaks of flour remain. Do not over-mix, as this can lead to a tough cake. Stop mixing as soon as the ingredients come together.
9. If using fresh blueberries, gently fold them into the batter. If using frozen blueberries, either fold them in gently after rinsing and drying (see notes) or simply spread the batter into the prepared pan first, then sprinkle the frozen blueberries evenly over the batter. After adding blueberries, spread the cake batter evenly into the prepared 9×9-inch pan. Retrieve the chilled streusel and sprinkle it generously over the top of the cake batter. For larger, more pronounced clumps, squeeze some of the streusel mixture in your hands before scattering it over the cake.
10. Bake at 375˚F (190°C) for 45 to 60 minutes. Baking time will vary depending on your oven and whether you used fresh or frozen blueberries (frozen may take longer). The cake is done when the center springs back when gently touched and does not jiggle. Do not rely solely on a toothpick test, as the streusel can scrape clean even if the cake is underbaked. If the streusel begins to brown too quickly, lightly tent the cake with aluminum foil.
11. Allow the cake to cool completely in the pan on a wire rack before cutting and serving. This allows the cake to set properly. Store the cooled cake covered tightly in its pan with aluminum foil or plastic wrap. Alternatively, transfer the cake (or slices) to an airtight container and store at room temperature for up to 5 days for optimal freshness.

Video

A video tutorial for this recipe will be available soon!

Notes

• To make homemade buttermilk: If you don’t have buttermilk on hand, you can easily make a substitute. Mix 1 cup of regular milk (dairy or non-dairy) with 2 teaspoons of white distilled vinegar or lemon juice. Let the mixture sit for 5-10 minutes until it slightly curdles. This will create a suitable acidic liquid for the recipe.
• To use frozen blueberries: For best results, you have two options.
  1. Either sprinkle the frozen blueberries directly over the cake batter, before adding the streusel. This prevents color bleeding into the batter.
  2. Or, if you prefer to fold them into the batter, rinse the berries thoroughly in a colander under cold water until the water runs clear. Pat the berries very dry with paper towels, and then toss them with 1 Tablespoon of flour to help prevent bleeding and sinking before folding into the batter.
• For a thinner cake: If you prefer a larger, thinner cake, you can bake this recipe in a 9×13-inch pan. Adjust the baking time to approximately 20-35 minutes at 375˚F, keeping an eye on the doneness.

Nutrition Information

Serving: 1 slice | Calories: 394kcal | Carbohydrates: 72g | Protein: 6g | Fat: 9g | Saturated Fat: 5g | Polyunsaturated Fat: 3g | Cholesterol: 63mg | Sodium: 367mg | Fiber: 2g | Sugar: 42g

Disclaimer: Nutritional values were calculated using a third-party tool and are provided as an estimation only. Actual values may vary based on ingredients used and preparation methods.

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*Originally published on January 20, 2013. Photos updated in March 2022 to enhance visual appeal.