Thisis a very good cake! in a bowl prepare a yellow cake mix as directed on box , in a 9×13 cake pan rub with butter , make sure it is a thick layer, next put brown sugar on top of the butter , then open a can of crushed pineapple drain the juice into the cake mix for extra flavor, pour the pineapple onto the brown sugar make sure it covers the bottom ,open two cans of apple pie filling believe me you will need two to cover the pan , mix in the pineapple juice into the cake pour over mixture thats in the pan bake for 35 to 40 minutes 45 if the oven has not been preheated ,when cake is done you can either let it cool  or cut it and topit with ice cream of your choice or whipped topping.ENJOY!!!!!!!!!!!