Hershey'S Disappearing Cake
["1/4 c. butter", "1/4 c. shortening", "2 c. sugar", "1 tsp. vanilla", "2 eggs", "3/4 c. Hershey's cocoa", "1 3/4 c. sifted all-purpose flour", "3/4 tsp. baking powder", "3/4 tsp. baking soda", "1/8 tsp. salt", "1 3/4 c. milk"]
["Grease and flour two 9-inch cake pans or 1 (13 x 9-inch) cake pan. Cream butter, shortening, sugar and vanilla until fluffy. Blend in eggs.", "Combine cocoa, flour, baking powder, soda and salt in bowl; add alternately with milk to batter. Blend well. Pour into pan. Bake at 350\u00b0 for 30 to 35 minutes. Cool 10 minutes. Remove from pan; frost when cool."]
["butter", "shortening", "sugar", "vanilla", "eggs", "cocoa", "flour", "baking powder", "baking soda", "salt", "milk"]