Start by browning your butter: place butter in a saucepan over medium heat and let melt, stirring occasionally. Melt until it starts to get light brown.

Place butter in a metal mixing bowl. Add 1/2 cup sugar and 1/2 cup packed brown sugar. Beat well until fluffy, scraping the sides.

Add peanut butter and mix until well combined. Add 1 egg and 1 and 1/2 teaspoons vanilla. Beat until combined.

Turn the mixer on to combine the dry ingredients into the dough, I added half the dry ingredients, mixed than added the other half. Make sure to scrape down the sides with a spatula. Cover the bowl and chill the dough for 15 minutes to an hour. (Or up to 2 days!)

Preheat oven to 350, spray a baking sheet with cooking or baking spray. Get out a bowl for the sugar. Roll out cookie dough into about 1 to 1 1/2 inch balls and place on baking sheet. Take your fork, dip it in sugar and make a mark in the cookie, then turn it the other way and do the same. Bake 10-13 minutes.

Take out of oven & let sit on baking sheet for 5 minutes. Then place on cooling rack. Repeat until all cookies are baked.