Prep: Heat oven to 350°F. Line a cookie sheet with baking parchment or a silicone baking mat.
Make cookie dough: Place peanut butter, sugar and egg in a mixing bowl and mix until well combined (I use an electric mixer, but a stand mixer or even a wooden spoon would work). Add the chocolate chips and stir in until evenly distributed.
Shape cookies and bake: Shape cookies, using around 1 heaping tablespoon of cookie dough per cookie. Place 2 inches apart on the prepared baking sheet. Bake for 8-10 minutes, or until lightly golden (cookies will still be soft). Cool on the cookie sheet for 5 minutes, then remove to a cooling rack to cool completely.