STEP-1
STEP-2
In a separate bowl whisk together the flour, cinnamon, baking powder, baking soda & salt. With the mixer on low speed beat about ⅓ of the flour mixture into the butter mixture, alternating with about ⅓ of the milk.
STEP-3
Repeat the process until everything is combined. In a separate bowl toss the chopped apple with ½ teaspoon cinnamon.
STEP-4
Gently fold the chopped apple into the muffin batter using a large rubber spatula or wooden spoon. Spoon the batter into the prepared muffin pan – you'll get about 12 muffins total.
STEP-5
In a small bowl stir the sugar and cinnamon for the cinnamon sugar topping together. Then sprinkle it on top of each muffin.
STEP- 6
Bake in the preheated oven for 17-20 minutes, or until the tops are golden and an inserted toothpick comes out clean.