Cream butter and sugars for 5 mins or until light and fluffy
Beat in the egg and peach flavoring.
Sift flour, salt, baking soda and *baking powder (see notes) and incorporate.
Add in diced peaches.
Scoop evenly sized balls onto parchment lined baking sheets.
Chill for 30 mins.
Preheat oven to 350 and bake for 15 mins.
Mix glaze and spoon over cookies.
Allow 45 mins to an hour to set fully.