7-Up Cake
["1 pkg. yellow or lemon cake mix (Duncan Hines 2-layer)", "1 small pkg. instant vanilla or lemon pudding", "4 eggs", "3/4 c. cooking oil", "10 oz. 7-Up", "Custard for 7-Up Cake"]
["Mix all ingredients well.", "Bake in greased and floured 8 or 9-inch pans for 35 minutes.", "Bake and remove from pans.", "Frost cake with 7-Up Cake Custard."]
["lemon cake", "instant vanilla", "eggs", "cooking oil"]