1 (16 ounce) package yellow cake mix
1 (3 ounce) package instant mango pudding mix
1 (4 ounce) can sliced pineapple, drained
Preheat oven to 350 degrees F (175 degrees C). Grease and flour 2 (9 inch) round pans. Mix together cake mix and pudding mix. Set aside.
In a large bowl, stir together cake mix and pineapple. Pour pudding mixture into prepared pans.
Bake for 35 to 45 minutes in the preheated oven, or until a toothpick inserted into the center of the cake comes out clean. Cool completely, and frost with mango icing. Cut into wedges.