Though made famous by the show, the chocolate cake is a star in its own right and won over our recipe testers and editors with its airy chocolate mousse filling, cocoa-forward frosting ...
Preheat oven to 350 degrees. Grease two 8-by- 12-inch cake pans, and line bottom with parchment paper. Sift cocoa powder, flour, baking powder, and salt into a medium bowl; set aside. Put butter ...