Beat together peanut butter, egg and brown sugar in a large bowl until thoroughly combined. Your dough will resemble a very crumbly cookie batter. Add in chocolate chips and beat on the lowest speed or stir - you just want to mix them in.

Preheat your oven to 350 and scoop dough by tablespoons, rolling into about 1 ½ inch balls in the palm on your hand. Place them about three inches apart on the cookie sheet and press down on them lightly with the palm of your hand. Make a criss cross pattern by lightly pressing a fork on the top of the cookie, then pressing it again from the other side.

Bake at 350 degrees for 12 minutes and remove to wire rack to let cool for about ten minutes.