Combine butter, peanut butter, sugars, egg, and vanilla until blended.
Combine remaining dry ingredients: flour, baking soda and salt.
Slowly add dry ingredients to peanut butter mixture until well combined. Dough will seem dry.
Form dough into balls by pressing together and rolling between the palms of your hands and place on Silpat or parchment paper lined cookie sheet..
Using a fork, press down the balls and create a criss cross pattern.
Bake in a preheated 350 degrees F (175 degrees C) oven until for about 7 (or LESS!) minutes until they look just barely done, almost underdone. DO NOT over bake! The cookies will get dry and crumbly if over baked. Look for a blonde cookie, rather than golden brown edges.
Cool completely on wire rack and store in airtight container.