Pour the apple cider into a large pot over medium-high heat.
Dice up the apples and toss them into the cider.
Peel the rind off the orange in large pieces and toss them in.
Add the allspice berries, the cinnamon sticks, and the cranberries.
Add the sugar and stir it around to dissolve.
Bring the mixture to a low boil, then reduce the heat to low and simmer for 45 minutes to 1 hour. Add the brandy if using, then simmer for another 10-15 minutes. In conclusion, Serve warm with a candied orange slice!