1 (16 oz.) can cherry pie filling
1 (20 oz.) can crushed pineapple with the juice
1 box yellow cake mix
1 stick butter

Butter a 9x13 inch sheet cake pan. Put in pineapple with juice and spread around. Put in cherry pie filling in dabs all around on top of pineapple. Sprinkle on cake mix. Top with thin slices of butter all over top; may need 1/2 stick more. Bake at 350 degrees for 40-45 minutes until slightly brown. Serve by itself or with ice cream or whipped cream.