Heat an oven to 350 degrees, and set out a large souffle dish, dutch oven or 9x13" baking dish.
Heat a large sauce pan over medium heat.
Add the berries, sugar, and flour.
10 Cups Blackberries, 1 Cup Sugar, 1/3 Cup Flour
Heat, stirring occasionally until thick and bubbling.
Pour into your baking dish.
Sprinkle the entire cake mix over all of the berries.
1 Cake Mix
Dot with all of the butter (break up little pieces all over the cake mix).
1/2 Cup Butter
Bake at 350 for 25 to 30 minutes.
Serve hot!
Notes
if you want to make this while camping just put it in a dutch oven with hot coals under and over the lid. Enjoy 30 minutes later!Store left overs in the refrigerator for 3-4 days