Simple Cocoa Layer Cake
["1/2 c. butter, softened", "1 1/4 c. sugar", "1 tsp. vanilla extract", "2 eggs, separated", "2 c. all-purpose flour", "1/2 c. Hershey's cocoa", "1 1/2 tsp. baking powder", "1/2 tsp. baking soda", "1/4 tsp. salt", "1 1/4 c. milk"]
["Heat oven to 350\u00b0. Grease and flour two 8-inch round baking pans.", "In large mixer bowl, beat butter, sugar and vanilla until creamy.", "Add egg yolks and beat well.", "Stir together flour, cocoa, baking powder, baking soda and salt.", "Add alternately with milk to butter mixture."]
["butter", "sugar", "vanilla extract", "eggs", "flour", "cocoa", "baking powder", "baking soda", "salt", "milk"]