Preheat the oven to 375°F and spray a muffin tin with non-stick cooking spray.
Unroll pie crusts and cut out circles using a round cutter (about 3.5 inches).
Press dough circles into the muffin tin to form mini pie crusts.
Spoon cherry pie filling evenly into each crust.
In a bowl, mix flour, brown sugar, and cinnamon. Cut in butter until mixture is crumbly.
Sprinkle crumb topping over each mini pie.
Bake for 20–25 minutes or until crust is golden and topping is lightly browned.
Let cool in pan before removing. Serve warm or at room temperature.