1 box Duncan Hines butter cake mix
4 eggs
1/2 c. oil
1 (11 oz.) can mandarin oranges
1 pkg. instant vanilla pudding

Combine mix, eggs, oil, and liquid from oranges; beat. Cut up oranges and fold into batter. Pour into 3 round cake pans. Bake at 350 degrees for 15-20 minutes. Allow cake to cool after removing from pans.

ICING:

1 lg. can crushed pineapple (refrigerate)
1 lb. pkg. Cool whip (11 oz.)

Mix pudding with undrained pineapple. Fold in large carton of Cool Whip. Fill between layers, sides, and top. Keep cake in refrigerator or frost just before serving.