Variable Stack Cake
["1 box Duncan Hines butter recipe fudge cake mix", "4 eggs", "1 stick margarine", "2/3 c. milk"]
["Combine all ingredients and mix well.", "Grease and flour four (9-inch) round cake pans.", "(Tip:", "Use cocoa instead of flour to eliminate white spots on bottom and sides.)", "Divide batter evenly among pans and bake at 375\u00b0 for 12 to 15 minutes."]
["butter", "eggs", "margarine", "milk"]