How to Make It
Heat the milk. Place the milk in a small saucepan and cook over medium-low heat until just simmering.
Chop the chocolate. Meanwhile, chop the mini dark and mini milk chocolate bars. When the milk is simmering, mix in the chopped chocolate, whisking constantly until all of the chocolate is melted and incorporated. Remove from heat and set aside.
Rim the mug. In a shallow, microwave-safe bowl, microwave the chocolate on high for 20 seconds intervals until fully melted, stirring between each interval. Dip the mug in the melted chocolate and then in the chopped Krackel.
Serve. Fill the mug with hot chocolate and sip (or, you know, guzzle it down).