Pour the apple cider into a medium saucepan and add the cinnamon stick, star anise, cloves, and orange slices. Heat everything over medium heat until you see small bubbles forming around the edges, but don't let it boil completely.

Reduce the heat to low, cover the pot, and let it simmer gently for 30 minutes to allow all those wonderful spices to infuse. Give it a taste after simmering – if you'd like it sweeter, stir in some brown sugar one tablespoon at a time until it's just right.

Pour the warm cider into mugs, add a fresh orange slice and star anise for garnish, and enjoy!

For the slow cooker method, simply add all ingredients to your slow cooker, cover, and heat on low for 2-2.5 hours. Taste and add sugar if needed, then serve in mugs with garnishes.