My favorite dump cake is blueberry. Start with can of crushed pineapple with juice in bottom of 9x13 pan. Spread blueberry pie filling on top, then sprinkle dry lemon cake mix on top. Add chopped pecans as many as you like on top of cake mix. Slice one stick of butter or margarine very thinly and put on top. Bake at 350 for one hour. Serve with ice cream or whipped cream. So good