# The Ingredients You'll Need:
→ Dry Ingredients
01 - 2 cups all-purpose flour
02 - 2 teaspoons ground cinnamon
03 - 1 teaspoon baking powder
04 - 1/2 teaspoon baking soda
05 - 1/2 teaspoon salt
→ Wet Ingredients
06 - 1/2 cup unsalted butter, melted and cooled
07 - 1 cup granulated sugar
08 - 2 large eggs
09 - 1 teaspoon vanilla extract
10 - 1/2 cup whole milk
11 - 1 1/2 cups peeled and finely diced apples (about 2 medium)
→ Optional Topping
12 - 2 tablespoons brown sugar
13 - 1/2 teaspoon ground cinnamon
# Step-by-Step Instructions:
01 - Set the oven to 375°F. Line a 12-cup muffin tin with paper liners or grease lightly.
02 - In a large bowl, whisk together flour, cinnamon, baking powder, baking soda, and salt.
03 - In a separate bowl, whisk melted butter and sugar until smooth. Add eggs one at a time, beating well after each addition. Stir in vanilla extract and milk.
04 - Gently fold the wet mixture into the dry ingredients until just combined; avoid overmixing.
05 - Fold diced apples into the batter evenly.
06 - Divide batter equally among muffin cups, filling each approximately three-quarters full.
07 - Combine brown sugar and cinnamon, then sprinkle over each muffin before baking.
08 - Bake for 20 to 22 minutes, or until a toothpick inserted in the center comes out clean.
09 - Allow muffins to cool in the tin for 5 minutes, then transfer to a wire rack to cool completely.
