Line a muffin tin with paper liners or lightly grease the cups.
Prepare the dry ingredients:
In a large bowl, whisk together the flour, granulated sugar, brown sugar, baking powder, baking soda, salt, and ground cinnamon.
Prepare the wet ingredients:
In a separate bowl, whisk together the melted butter, milk, eggs, and vanilla extract.
Combine ingredients:
Add the wet ingredients to the dry ingredients and mix until just combined. Be careful not to overmix.
Gently fold in the chopped peaches.
Scoop the batter:
Divide the batter evenly among the muffin cups, filling each about 3/4 full.
Add topping (optional):
In a small bowl, mix the granulated sugar and ground cinnamon for the topping.
Sprinkle a small amount of the cinnamon-sugar mixture on top of each muffin.
Bake the muffins:
Bake in the preheated oven for 18-22 minutes, or until a toothpick inserted into the center comes out clean and the tops are golden brown.
Cool and serve:
Allow the muffins to cool in the pan for 5 minutes, then transfer them to a wire rack to cool completely.
Notes
These Peach Muffins are a delightful treat with a tender crumb and sweet peach flavor, perfect for breakfast, a snack, or a light dessert. Enjoy the freshness of summer peaches in every bite!