Preheat your oven to 350°F (175°C).

In a mixing bowl, cream the softened unsalted butter and granulated sugar for 2-3 minutes until light and fluffy.

Add the large eggs one at a time, mixing well after each addition, then add the vanilla extract.

In a separate bowl, whisk together the all-purpose flour, baking soda, and cinnamon, then gradually add to the wet mixture on low speed until just combined.

Gently fold in the diced fresh peaches using a spatula.

Drop rounded spoonfuls of cookie dough onto ungreased baking sheets, spacing them about 2 inches apart.

Sprinkle a bit of brown sugar on top of each dough ball before baking.

Bake for 12-15 minutes until the edges are golden and the centers are soft.

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