The recipe I have is for yellow sponge cake. It uses egg yolks and whites, vanilla, vegetable oil, buttermilk, butter, sugar, salt, baking soda, baking powder, and cake flour. I have dutch process cocoa and good bittersweet chocolate on hand. I know I need to remove some flour to add cocoa, do I need to remove anything to add melted chocolate?
(Oh, and $10 off your order of $50 or more in the Food52 Shop, too.)