1 can cherry or peach pie filling (reg. size)
1 can crushed pineapple (reg. size)
1 box white cake mix
1 stick butter

Use 9 x 12 pan. Spread pie filling in bottom. On top of that spread pineapple (DO NOT drain). Sprinkle cake mix over pineapple. Cut butter in slices and dot cake mix. Bake 1 hour at 350 degrees, or longer to get desired brown-ness.