Combine the dry ingredients (oats through salt) in a mixing bowl.
In a separate mixing bowl, combine the peanut butter and brown sugar and use a stand mixer, hand mixer, or whisk to beat together. Add the egg and milk and beat together until combined.
Gradually add the dry ingredients. Keep the mixer going while you add to steadily incorporate the dry ingredients and beat until you create a dough.
Stir in the chocolate chips.
Use an ice cream scoop or large spoon to scoop the dough into cookies and place on a lined baking sheet. This recipe will make 12-15 cookies, depending on how big you shape your cookies.
Bake for 10-12 minutes in the oven, or until golden brown and firm on top.