1 box yellow cake mix
6 cups blackberries 4 to 5 cups if they are large berries
1 to 2 tablespoons sugar
1 stick butter
1 cup water
In the bottom of a 9×13 baking dish, pour one box of yellow cake mix.
Spread blackberries over the top of the cake mix.
Sprinkle on 1 to 2 tablespoons of sugar (depending upon how sweet they are).
Pour 1 cup of water over the top of the berries and cake mix then shake the pan so water settles into the bottom. If berries aren’t very juicy, add a little more water. If they are plump, a little less.
Cut a stick of butter into 8 pieces and spread out over the top.
Bake at 350 for 35 to 40 minutes.
Slice and serve warm.