Add oats to a food processor. Blend on high until oats are fine and resemble flour.
Add all remaining ingredients except for the chocolate chips. Blend until the mixture forms a ball and pulls away from the sides of the food processor. Note: if it appears too crumbly, add one additional tbsp milk.
Stir in chocolate chips by hand (transfer into a bowl to do this if needed).
Divide mixture and roll into 18 equal-sized smooth balls (packed 2 tbsp cookie scoop).