Mock Lemon Meringue Cake
["1 pkg. lemon cake mix", "2 c. prepared lemon pudding and pie filling", "1 (8 oz.) container frozen whipped topping"]
["Bake cake as directed on package in a 10-inch tube pan.", "Cool. Cut cake in 3 layers.", "Stir pudding and pie filling until smooth. Spread 1/3 of filling between each layer and on top of cake. Frost sides and center with whipped topping.", "Refrigerate."]
["lemon cake mix", "frozen whipped topping"]