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. all-purpose flour (unsifted)", "3/4 tsp. baking powder", "3/4 tsp. baking soda", "1/8 tsp. salt", "1 3/4 c. milk"]
["Grease two 9-inch round cake pans. Cream butter, shortening, sugar and vanilla until fluffy. Blend in eggs. Combine cocoa, flour, baking powder, baking soda and salt in bowl. Add milk and blend. Bake at 350\u00b0 for 30 to 35 minutes."]
["butter", "shortening", "sugar", "vanilla", "eggs", "cocoa", "flour", "baking powder", "baking soda", "salt", "milk"]