1Spray a Dutch oven with vegetable oil cooking spray. Preheat oven to 350 degrees F.
Drain only 1 can of the peaches. Combine both cans of peaches, including the juice from the UNdrained can, the blueberries, the baking mix, sugar, and a sprinkling of cinnamon. Place this mixture into the Dutch oven.
To make the topping: Combine the baking mix, sugar, butter, and milk in a resealable plastic bag. Drop bits of dough, using your fingers, on top of the peaches. Sprinkle with cinnamon sugar.
Place the Dutch oven into the preheated oven for 30-45 minutes, or until the top is golden brown and crusty.