Blackberries to fill a 9 x 13 baking pan 3/4 to the top
1 pkg. yellow cake mix
1/4 lb butter or cookable margarine, in pats
1 Tbsp lemon juice or water
Fill 9 x 13 glass cooking pan with blackberries. Dump cake mix over the top, dotting with pats of butter or margarine. sprinkle with lemon juice or a little water to moisten. Bake at 350 F approximately 20 minutes until butter melts and topping is a bit crunchy.