Preheat oven to 350 degrees.
Add butter, peanut butter, 2 tablespoons sugar, brown sugar, and mix together.
2 tablespoons Butter room temperature, 2 tablespoons Peanut Butter, 4 tablespoons Sugar, 1 tablespoon Brown Sugar
Add in vanilla extract and egg yolk and mix until everything is combined.
1 Egg Yolk, 1/4 teaspoon Vanilla Extract
Stir in flour and baking soda.
1/3 cup Flour, 1/8 teaspoon Baking Soda
Scoop into a ball and roll in the remaining two tablespoons of sugar.
Place on a baking sheet and gently press down into a flatter disk. Bake for about 10-12 minutes.
As soon as they come out of the oven, press a chocolate candy kiss in the middle of the cookie.
6 Chocolate Candy Kisses
Let cool slightly and enjoy!