Freeze ice cream maker bowl attachment for at least 24 hours or according to the instructions that came with your attachment
Optional - warm milk and sugar in pan on the stove, over low heat just until sugar is dissolved
Combine all ingredients, except the chocolate chips, in a mixing bowl. Make sure completely combined
Ensure ice cream base is at minimum room temp or chilled - either by placing in fridge or placing the mixing bowl with the ice cream base into a larger bowl with ice water
Install/attach ice cream maker attachment, including the frozen bowl, to your KitchenAid based on your instructions
Turn the KitchenAid to low speed, confirming the mixing attachment is lined up and is properly spinning/churning in your bowl
As the KitchenAid is on low speed and churning add your ice cream base to the ice cream maker
Churn ice cream for about 20 minutes, keeping an eye on it. If desired, after 10 minutes, add in chocolate chips while ice cream maker is churning. The consistency should be a little thicker than a milkshake when complete
Transfer ice cream to a freezer safe container, and freeze for at least 5 hours or until desired consistency.