Building a layer cake can be tricky. It also typically requires you to use multiple pans. But what if we told you there's another way? If you have a 13-x-9 pan hanging around, you don't actually ...

1. Set the oven at 350 degrees. Butter a 9-inch round layer cake pan. Line the bottom with parchment paper and butter the paper. 2. In a bowl, whisk the flour, baking soda, salt, cocoa powder ...