1 box yellow cake mix
1 lg. can crushed pineapple
1 lg. size instant vanilla pudding
1 (12 oz.) Cool Whip

Bake cake according to directions on box. Remove from oven and immediately pour pineapple over cake. Mix pudding according to directions on box and pour over pineapple. Stir Cool Whip until easy to spread over pudding. Put in refrigerator immediately to cool. Keep in refrigerator.