Mandarin Orange Cake

1 package yellow cake mix
1/2 cup vegetable oil
1/2 cup chopped walnuts
4 eggs
1 can (11 ounces) mandarin orange segments, undrained
Pineapple Frosting (See Below)

Heat oven to 350 degrees. Grease bottom only of rectangular pan, 13x9x2 inches, or lightly spray with cooking spray.

Beat cake mix, oil, walnuts, eggs and orange segments in large bowl with electric mixer on low speed 30 seconds; beat on medium speed 2 minutes. Pour into pan.

Bake 35 to 40 minutes or until toothpick inserted in center comes out clean. Cool completely, about 1 hour. Frost with Pineapple Frosting. Store tightly covered in refrigerator.

Pineapple Frosting
1 can (20 ounces) crushed pineapple, undrained
1 package (4-serving size) vanilla instant pudding and pie filling mix
1 cup frozen (thawed) whipped topping

Stir together pineapple and pudding mix (dry). Gently stir in whipped topping.