Preheat oven to 350 degrees.
Line a large baking sheet with parchment paper or non stick spray.
Cream together butter, sugar, brown sugar.
Add egg, vanilla and peanut butter and mix together until well blended.
Add flour, baking soda, baking powder and salt. Mix until well combined and smooth dough forms.
With an ice cream scoop or tablespoon size spoon, drop cookie dough balls onto lined baking sheet.
Bake for 8-10 minutes.
Cookies will feel very soft, but they will set perfectly.