Mix cake mix, oil,eggs,and mandarin oranges with juice. Mix well and pour in round cake pans that have been lightly oiled and floured. For 2 layer bake 25 minutes on 350degrees for 3 layer 18-20 minutes. Cake is done when toothpick inserted comes out clean.
Icing: Add vanilla pudding,crushed pineapple w/juice and cool whip. Mix well and spread between layers and finish by covering cake. This cake has to be refrigerated and the longer it sits the better it gets. Happy eating!