Preheat oven to 400 degrees. Grease a 9x9 baking dish (11x7 works fine as well) with cooking spray.
Mix cherries and chocolate chips with brown sugar, white sugar, flour, and cinnamon. Once combined, set aside.
In a separate bowl, with a pastry cutter or fork, combine butter and muffin mix until well combined (it will take a few minutes to work the butter into the mix).
Pour cherries in an even layer in the baking dish. Top with spoonfuls of the muffin mix (the topping does not need to cover all of the fruit). Sprinkle with cinnamon sugar.
Bake for 40-45 minutes, or until the fruit is bubbling and the muffin mix is golden brown and set.
Serve with whipped cream, fresh berries, and/or ice cream!
Enjoy!