1 yellow cake mix
1 lg. can pineapple, crushed
1 lg. pkg. vanilla pudding, instant
1 (8 oz.) Cool Whip

Mix and bake cake mix as directed. Pour into large baking pan. Pour pineapple (juice also) over cake. Prepare vanilla pudding according to directions. Pour over the layer of pineapple. Spread Cool Whip over top and garnish as desired.