4 ounces (1/2 cup) slated butter, melted and divided
1 (21-ounce) can strawberry pie filling
1 (21-ounce) can blueberry pie filling
2 cups all-purpose baking mix (such as Bisquick)
¼ granulated sugar
¼ cup whole milk
Heat a camping stove to medium (about 350° to 375°F). Pour ¼ cup of the melted butter in a 7 1/2 – quart cast-iron Dutch ove, and place on the camping stove. Add the strawberry pie filling; top with the blueberry pie filling. (Do not stir the pie fillings together.) Bring to a simmer.
Combine the baking mix, sugar, milk, and the remaining ¼ cup melted butter in a bowl; stir until a dough forms. Crumble the dough evenly over the simmering fruit int eh Dutch oven; reduce the heat to medium-low (about 300 to 325).
Cover the Dutch oven with the lid, and cook until the topping is set, about 30 minutes. Sprinkle with the cinnamon-sugar, if desired.