How much cinnamon for a gallon of cider?

For a gallon of cider, you can use about 1 to 2 tablespoons of ground cinnamon or 2 to 4 cinnamon sticks, depending on your taste preference. If you want a stronger cinnamon flavor, lean toward the higher end of that range. It's best to start with less and adjust according to your liking, as cinnamon can be quite potent. Always allow the cider to steep for a bit to let the flavors meld.