Peanut butter chocolate chip bars are thick, soft and chewy chocolate chip cookie bars made with creamy peanut butter. These peanut butter cookie bars are easy to make in in one bowl.
In a large mixing bowl, whisk in the cooled melted butter with the light brown and granulated sugars and creamy peanut butter until smooth and well combined. Whisk in the eggs and vanilla extract until smooth and well combined.
Stir the dry ingredients into the wet until just combined. I like to do this about ½ of the dry ingredients at a time. Fold in most of the chocolate chips. Reserve about ½ cup for topping the cookie bars.
Press the cookie dough into the prepared pan. Bake for about 22 - 27 minutes or until the edges of bars are a light golden brown, slightly puffed up and the edges are slightly pulled away from the sides of the pan.
Cool the peanut butter chocolate chip bar cookies in the hot pan for 25 - 30 minutes. Gently lift the cookie bars out of the pan and to cool on a cooling rack. Slice and enjoy!