1 box yellow cake mix (butter recipe)
1/2 cup vegetable oil
1 10.5-ounce can mandarin oranges, including juice
1 small package vanilla instant pudding mix
1 20-ounce can crushed pineapple, including juice
8- or 9-ounce package whipped topping
Grease and flour two 9-inch layer cake pans. Ignoring package directions, mix dry cake mix with oil and eggs. Beat on medium speed until smooth. Add mandarin oranges and mix by hand. Pour into pans. Bake at 325 for 25-30 minutes. Cool and remove from pans.
Sprinkle pudding mix over the crushed pineapple in a bowl. Fold in whipped topping and mix gently. Spread between layers and over outside of cake. For best results, chill overnight before serving.