01 - Preheat oven to 375°F. Line a baking sheet with parchment paper for easy cleanup.
02 - Unroll the refrigerated pie dough. Using a 2.5-inch round cutter, cut out 12 circles from the dough.
03 - Gently press each dough circle into the wells of a mini muffin tin, forming small cup shapes that fit snugly.
04 - Spoon approximately 1 tablespoon of cherry pie filling into each pastry cup, distributing evenly.
05 - If desired for a golden finish, lightly brush the exposed pastry edges with beaten egg using a pastry brush.
06 - Combine granulated sugar and ground cinnamon in a small bowl. Sprinkle the mixture evenly over the tops of all filled pastry cups.
07 - Bake for 13 to 15 minutes until pastry turns golden brown and cherry filling becomes bubbly.
08 - Let cool in the muffin tin for 5 minutes, then carefully transfer to a wire rack to finish cooling completely before serving.