Heat oven to 375°F. In large bowl, beat 1/2 cup granulated sugar, the brown sugar, peanut butter, butter and egg in your stand mixer or electric mixer until well blended.
Stir in flour, baking soda and baking powder until dough forms.
Shape dough into 1-inch balls and roll in additional granulated sugar.
On ungreased cookie sheets, place about 2 inches apart.
Bake 8 to 10 minutes or until edges are light golden brown.
Immediately press 1 milk chocolate candy in center of each cookie. Remove from cookie sheets to cooling rack.
Place in the freezer for a few minutes and take them out.