In a small saucepan, combine the heavy cream with the milk and all of the spices and bring to a boil. Remove from the heat and let steep for 20 minutes.
Strain the cream into a bowl and wipe out the saucepan. Return the cream to the saucepan and bring to a boil. Put the chocolate in the bowl and pour the hot cream over it. Let stand for 3 minutes, then whisk until smooth. Transfer the fondue to a bowl and serve.