Preheat oven to 375°F. Line baking sheets with parchment paper or silicone liners.
Whisk together flour, salt, and baking soda in a bowl. Set aside.
In a large bowl, beat butter, granulated sugar, and brown sugar until light and fluffy, about 2-3 minutes.
Add egg and vanilla, mixing until well combined.
Reduce mixer speed to low. Add flour mixture and mix just until combined.
Fold in peaches and peach preserves until just incorporated. Dough will be soft.
Drop dough by tablespoonfuls onto prepared pans, spacing 2 inches apart.
Mix sanding sugar and cinnamon. Sprinkle about ⅛ teaspoon over each cookie.
Bake for 11 to 13 minutes until golden and just set. Cool on pan 5 minutes, then transfer to wire racks.