Place chocolate chips on the bottom of a large mug (approximately 4 tablespoons of chocolate chips for 6 ounces of milk or cream and 6 tablespoons of chocolate chips for 8 ounces of milk or cream.
In a separate mug, heat milk for 1-2 minutes in the microwave. Pour over the chocolate chips and allow to sit for approximately one minute before stirring. For creamier consistency try using an immersion blender.