egg whites, fat free sour cream, brown sugar, vanilla extract, skim milk (i like the evaporated milk. it makes it more dense, and almost brownie like) or 1 cup fat-free evaporated milk (i like the evaporated milk. it makes it more dense, and almost brownie like), salt, baking powder, baking soda, cocoa powder, all-purpose flour (depending on how dense you like your cake)