Cream the butter and the peanut butter together. Beat in the vanilla.

In a separate bowl, combine flour, sugar, and salt and add to the butter mixture.

Mix until the dough comes together and is no longer crumbly. Stir in the chips.

Turn the dough out onto a piece of waxed paper. Gently pull the dough together and form it into a log. Refrigerate for at least an hour.

Preheat oven to 350°F.

Remove cookie batter from refrigerator and cut into 1/3 inch slices.

Place cookies on a parchment lined baking sheet and bake for 16 minutes.

Let the cookies cool on the pan for 5 minutes before transferring to a rack.