Preheat the oven to 350 degrees.
Line two cookie sheets with parchment paper, optional, and set aside.
Whisk the flour, cocoa, baking soda, and salt in a medium bowl. Set aside.
Beat the butter, sugar, and peanut butter in the bowl of an electric mixer, or with a hand mixer, until light and fluffy, about 2 minutes.
Add the eggs and vanilla and mix well.
Stir in the dry ingredients until fully combined.
Fold in the chocolate chips.
Roll heaping tablespoons of dough into a ball. Press the tops with a fork creating the classic peanut butter criss cross top.
Place 1 to 2 inches apart on the prepared trays.
Bake for 8 to 10 minutes, or until cooked through.