Pig Pickin' Cake

1 pkg. (18 1/2 oz.) butter flavor cake mix with pudding
1/2 c. oil
4 eggs
1 can (11 oz.) mandarin oranges
1/2 c. chopped walnuts

Grease two 9-inch layer cake pans. Line bottoms with waxed paper. Grease again, set aside. Prepare cake mix according to package directions using oil, eggs and juice drained from oranges. Stir in oranges and nuts. Spread evenly in prepared pans. Bake in preheated oven at 325 degrees for 25 minutes. Cool pans on rack 10 minutes. Remove from pan, peel off paper. Cool completely on racks.

Frosting For Pig Pickin Cake:
20 oz. can crushed pineapple in pineapple juice
1 c. thawed, frozen whipped topping
1 pkg. (4 serving size) vanilla instant pudding

Mix pineapple and juice in vanilla pudding. Fold in whipped topping.