1. Combine cinnamon sticks, cloves, allspice, apple cider, water, sugar, ginger liquer, orange juice, and bourbon in bowl of slow cooker (Optional: First, tie cinnamon sticks, cloves and allspice in cheesecloth).
2. Simmer on low for 2-3 hours. Add cranberries and simmer at least 30 additional minutes. Spoon into mugs and garnish with orange slices.
- You can also do this on the stovetop. Just bring to a boil and then reduce the heat and simmer for 15-20 minutes.
- If you can't find ginger liquer, replace with 2 tsp grated ginger and 1/2 cup vodka.