CAKE:

1 yellow cake mix (can be butter or French vanilla)
1 box vanilla instant pudding
1 can crushed pineapple, drained

Bake cake according to directions on box.

TOPPING:

1 container Cool Whip
1 box vanilla instant pudding
1 can crushed pineapple, drained

Mix pineapple and pudding. Add Cool Whip and put in cake.