To make Bruce Bogtrotter's cake, you'll need a rich chocolate cake recipe. Look up the one on Binging With Babish for a good start. This cake is known for being 18 inches big, with three layers, and covered in chocolate icing.The ingredients include butter, flour, sugar, and cocoa. You also need baking powder, baking soda, salt, buttermilk, eggs, and oil. Make the cake layers, then top them off with a chocolate ganache.