1 (18.25 oz) butter recipe cake mix
1/2 cup vegetable oil
1 (15 oz) can mandarin oranges, undrained and separated
3 eggs

FROSTING:

1 (8 oz) can crushed pineapple, undrained
1 (3.4 oz) box vanilla OR french vanilla instant pudding mix
13 oz cool whip, thawed

for the cake: add the cake mix, oil, eggs and mandarin oranges to a large mixing bowl. put a few of the mandarin oranges aside for garnish (about 6-8 segments). mix using an electric mixer. pour into two greased and floured round cake pans. bake at 350° approximately 30 minutes. remove from oven and let cool 10 minutes. remove from pans and cool completely on a baking rack. frost when cakes are completely cooled.

for the frosting: mix pudding mix and pineapple together with spoon. fold in cool whip until well blended. keep refrigerated.