I just baked an orange/pineapple cake that we first ate while in the South. You used Duncan Hines orange cake mix and bake as stated. Let it cool down to WARM, and then put a can of crushed pineapples evenly over the warm cake. The syrup sinks into the warm cake. Then put it in the fridge til it is cold. Then cover it with cool whip and put back in the fridge til you serve it.
It is really delicious, refreshing, and tropical for our hot summer days.
Where I live, you can't get DH's orange cake mix, so I had a friend send me some from Tennessee. It's crazy that I can't buy it here. Oh well, worth the wait.