All you need is an offset spatula to create this bakery swirled frosting. An easy way to decorate sheet cakes, dessert bars, and brownies.

I’ve wanted to share this simple, elegant frosting technique for a long time. I trained in culinary school and spent internship time working in bakeries, where we used this swirled pattern on sheet cakes and brownies all the time. It looks fancy but is very easy to do—perfect for home bakers who want a professional finish. Below is a clear, step-by-step guide so you can recreate the look.