Step 1

Heat oven to 350°F (325°F for dark or nonstick pan). Grease or lightly spray bottom only of 13x9-inch pan.

Step 2

In large bowl, beat cake mix, oil, walnuts, orange segments, reserved 1/3 cup orange liquid, and eggs with electric mixer on low speed 30 seconds, then on medium speed 2 minutes. Pour into pan.

Step 3

Bake 35 to 40 minutes or until toothpick inserted in center comes out clean. Cool completely, about 1 hour.

Step 4

To make pineapple frosting, stir together pineapple, dry pudding mix and orange peel. Gently stir in whipped topping. Spread on cake. Store tightly covered in refrigerator.