butter, softened, sugar, egg yolks, beaten (whites are used in frosting), eggs, baking soda, vanilla extract, buttermilk, flour, egg whites (left over from using the yolks for the cake), powdered 10x sugar, vanilla extract
yellow cake mix, unsweetened baking cocoa, eggs and
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yellow cake mix, unsweetened baking cocoa, eggs, vegetable oil, buttermilk, red food coloring (do not reduce amount !), cream cheese frosting (see kittencal s best (extra creamy option))