- 1
Preheat oven to 350°F. Spray three regularly sized muffin tins with cooking spray.
- 2
Fill muffin tin cavities with a golf ball-sized ball of cookie dough (about 1 ½ Tbsp.). Shape the dough up the walls of each muffin tin, making sure to evenly spread into a thin layer.
- 3
Bake cookie dough according to package directions, or until cookies are golden brown around the edges. Remove muffin tin from oven, let cookies cool for 1 minute, and then use a greased shot glass to press down in the center of each cookie to create a deep well. Allow to cool for 10 minutes, then gently remove cookies from tin to cool completely.
- 4
In a microwave-safe bowl, heat chocolate chips in 30 second intervals, stirring after each stop until chocolate is completely melted and smooth.
- 5
Use a small spatula to coat the interior of the cookies with melted chocolate, making sure to cover the entire surface. Freeze shot glasses until chocolate hardens, about 20 to 30 minutes.
- 6
Let cookies warm at room temperature for about 10 minutes before filling with milk. Serve and enjoy!