Place the chocolate liquor, Kahlua, and Mocha Iced Coffee into a blender. Add 4 scoops of ice cream and pulse until smooth. If you'd like a thicker milkshake, add the additional two scoops of ice cream.
Drizzle chocolate sauce in glasses, then pour milkshake in. Top with whipped cream, if desired. Serve immediately.
Notes
You can use vanilla or chocolate ice cream. Each has a great flavor!