Grab an old towel you don’t use anymore. Cut it into long strips, wide enough to cover the sides of your cake pans. You only need one strip per pan.
Pour your cake batter into greased pans (I use my cake pan release). I like to weigh each pan to make sure the batter is divided evenly so the layers bake the same.
Wrap a damp towel strip around each cake pan. Make sure it’s snug and secure so it stays in place while the cakes bake.
Place the pans on a baking tray and bake as directed. For the recipe in this post, I baked at 165°C (330°F) for 40 minutes. Once they’re done, carefully remove the towel strips (they’ll be hot!) and let the cakes cool for around 10 minutes (or more if needed).
Flip the cakes out onto a cooling rack and let them cool completely. I like to trim the tops even if they look flat, it helps when I soak them in syrup, and it makes the final slice look smoother.
Video
Keyword bake flat cakes, how to bake flat cake layers