Preheat oven to 350°
In a bowl, mix together the melted butter, 1 egg plus 1 egg yolk, brown sugar, and vanilla. Make sure the butter is cooled down so it does not cook the egg.
In a separate bowl, combine the flour, baking soda, salt, and peanut butter and mix until combined.
Mix the dry ingredients with the wet ingredients and stir until combined.
Refrigerate for 30 minutes or Freeze for 10 minutes
Scoop tablespoon size cookie balls onto a baking sheet lined with parchment paper leaving about a 2 inch space between each cookie.
Place a fork on top of the cookie slight pressing down to create fork lines.
Bake for 10-12 minutes or until edges are slightly brown.
