Cream the butter and sugar together until fluffy (1-2 minutes) with an electric mixer.
Mix in the egg and vanilla and set aside.
In another bowl, whisk together the flour, cream of tartar, baking soda, cinnamon and salt.
Slowly add the dry ingredients to the wet ingredients and mix together on low until well combined.
Gently fold in the peaches.
Take 1-2 Tbsp of dough (depending on how big you want to make the cookies) and roll into a ball.
Roll the dough balls in the topping mixture and place them on the cookie sheet. Bake
Bake for 10 minutes at 350 degrees. They will set a bit more while cooling.
Cool for about 10 minutes on the cookie sheet before transferring to a wire rack to cool completely.