The cake is baked in two 6-inch cake pans. If you just have one cake pan, you can bake one layer at a time and use the same pan twice.
The frosting is the star of the show. It's a Swiss meringue buttercream with added brown butter. This makes it rich in flavor, creamy, yet light.
While the cakes are baking, brown the butter for the frosting so it has a chance to cool.