This lemon dump cake recipe is simple, so there is lots of room to personalize and make it your own. Try changing the cake mix to a lemon or white for a subtle flavor difference. For something unique, experiment with different pie fillings, like blueberry for a lemon blueberry dump cake! Strawberry pie filling is also a delicious option.   And finally, you can also customize your dump cake by adding lemon curd or lemon pudding mix for a more intense lemon flavor!