1 yellow Duncan Hines cake mix (save 1 c. & set aside)
1 egg
1 stick butter

Blend together and spread in 9"x13" pan. 2/3 c. evaporated milk 2 eggs 1 tsp. vanilla

Mix and spread on top of cake layer. Mix remaining cup of cake mix, 1/4 cup sugar, 4 tablespoons butter and crumble on top. Bake at 350 degrees for 50 to 60 minutes. Serve with whipped cream or Cool Whip.