In a food processor, blend the cookies until a fine crumb forms. (Or use a rolling pin to crush them in a ziploc bag.)
In a 6 to 8-ounce microwave-safe mug or small prep bowl, combine the crushed cookies, milk, sugar, and baking powder. Then stir in the chocolate chips.
Cook in the microwave for 1 minute, then add an additional 10 seconds if needed.
Let cool for 2-3 minutes, top with more chocolate chips and/or ice cream, and enjoy.
Notes
Make sure to use classic Chips Ahoy! cookies (or similar) and not chewy Chips Ahoy!
4 Chips Ahoy cookies are 1.6 ounces, this should help should you use a different brand.
Top with whipped cream, ice cream, cookie crumbs, powdered sugar, and more.