75 cl rye whiskey75 cl sweet vermouth38 cl unsweetened apple cider3 cinnamon sticks5 whole cloves½ cup granulated sugar10 dashes Angostura bitters
instructions :

Combine all ingredients in a crockpot and set to low for 1 hour before serving. Ladle into mugs and garnish. Makes 12–15 servings.

source :
imbibemagazine.com