Make frosting first.

Mix: 1 (3 oz.) pkg. vanilla instant pudding 1 (8 oz.) pkg. Cool Whip

Mix well and refrigerate.

CAKE:

1 yellow cake mix
3/4 c. oil
3 eggs
1 sm. can mandarin oranges & juice
1 tsp. vanilla

Mix with beater for 3 minutes. Bake at 350 degrees for 35 minutes. Cool and frost; refrigerate. Tastes better after refrigerated overnight.