1 Beat The Butter Until Creamy, 2 Minutes. Add The Sugars, Beat For 2 More Minutes. Mix In The Peanut Butter And Egg. Mix Together The Dry Ingredients - Flour, Baking Soda, Baking Powder And Salt. Stir The Dry Ingredients Into The Sugar Butter Mixture. 2 Wrap Dough In Plastic And Refrigerate At Least 3 Hours. 3 Preheat Oven To 375