1 box Duncan Hines cake (baked according to directions in 9x13 pan)
1 (20 oz.) can crushed pineapple in heavy syrup
1 (12 or 16 oz.) Cool Whip
1 pkg. instant French vanilla pudding

Remove cake from oven. Pour pineapple over cake while warm. Combine Cool Whip with pudding folded into it. Takes a lot of folding to get to creamy stage. Frost cake while warm. Keep refrigerated.