Creating Apple Crumble Cupcakes is a joy in itself. Follow these steps to bring this incredible recipe to life:

1. Preheat Your Oven: Begin by preheating your oven to 350°F (175°C). Line a 12-cup muffin pan with cupcake liners.

2. Mix Dry Ingredients: In a mixing bowl, whisk together the flour, baking powder, baking soda, salt, and cinnamon.

3. Cream Butter and Sugar: In a separate large bowl, cream together the softened butter and granulated sugar until light and fluffy.

4. Add Eggs and Vanilla: Beat in the eggs one at a time, then stir in the vanilla extract.

5. Combine Mixtures: Gradually add the dry ingredients to the wet mixture, alternating with the buttermilk. Mix until combined.

6. Fold in Apples: Gently fold the diced apples into the batter until evenly distributed.

7. Prepare Crumble Topping: In a small bowl, combine the rolled oats, brown sugar, flour, and cinnamon. Add the cold butter pieces and mix with a fork until crumbly.

8. Fill Muffin Pan: Spoon the cupcake batter into the prepared muffin cups, filling them about two-thirds full.

9. Add Crumble Topping: Sprinkle the crumble mixture generously over each cupcake.

10. Bake: Place the pan in the preheated oven and bake for 20-25 minutes, or until a toothpick inserted into the center comes out clean.

11. Cool: Remove the cupcakes from the oven and let them cool in the pan for 10 minutes. Then transfer them to a wire rack to cool completely.

12. Serve: These cupcakes can be enjoyed warm or at room temperature. They’re a great treat either way!