Place the chocolate in a microwave safe bowl. Melt in the microwave at 30 second increments, stirring each time until chocolate is completely melted and smooth.

Dip one side of a pretzel in the chocolate and place on a baking sheet lined with parchment. Repeat with a second pretzel and place one donut on top. Using a toothpick dipped in chocolate, place a small dot of chocolate on the back of an eye and place on the front of the donut. Repeat with a second eye.

Repeat with the remaining pretzels, donuts and eyes until all the bats are assembled. Allow the chocolate to cool.

In a small bowl, whisk together the sugar and milk. Transfer the mixture to a zip top bag with the corner snipped off and pipe a small line for the mouth. Pipe two small triangles below the line for the fangs. Allow the mouth to harden.

Serve.