Combine the Sweetie Magic, cocoa powder, Pasilla, Guajillo and Chipotle chilies in a mixing bowl or heatproof pitcher. Stir until combined. Stir the milk and heavy cream together in a saucepan and place over low heat. Heat the milk and cream until it is just beginning to simmer at the edges. Pour about ¼ cup of the liquid into the dry ingredients and whisk until they are combined into a smooth paste. Gradually whisk in the remaining liquid. Return the chocolate mixture to the saucepan and bring back to almost simmering. Serve hot.