Preheat the oven to 350°F (175°C).

In a mixing bowl, cream together the softened butter, brown sugar, and granulated sugar until light and fluffy.

Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.

In another bowl, whisk together the flour, baking powder, baking soda, and salt.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined.

Fold in the diced peaches gently.

In a small bowl, mix together the granulated sugar and cinnamon for the topping.

Drop tablespoon-sized balls of dough onto a baking sheet lined with parchment paper.

Sprinkle the cinnamon sugar mixture over the top of each cookie dough ball.

Bake in the preheated oven for 10-12 minutes or until the edges are lightly golden.

Allow cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.