Tennessee Ernie Ford's Pea-Picking Cake

1 (18.25 oz.) box yellow or white cake mix
1/2 cup (1 stick) butter or margarine
4 eggs
1 small can mandarin oranges, save juice for cake mix

Combine cake ingredients and bake in greased and floured 9 x 13-inch pan at 350 degrees for 35 to 40 minutes. Test cake doneness with wooden pick. Cool cake before frosting.

Frosting:
1 (12 or 13 ounce) container Cool Whip, thawed
1 small or medium can crushed pineapple, save juice to
   pour over cooled cake
1 (3 ounce) package instant vanilla or coconut pudding (do not
   make pudding according to package directions)

Combine ingredients: dry pudding, Cool Whip and crushed pineapple. Before frosting cake, pour pineapple juice over cooled cake.