Cider or juice: I recommend using apple cider, or a high quality unfiltered apple juice to achieve the best flavor possible. Avoid clear apple juice and sparkling cider.
Brown sugar: if you prefer a sweeter mulled apple cider, add a little brown sugar. I recommend mulled as normal, then taste it. Add 1 tablespoon of brown sugar if required, stir, then taste again. Repeat until you reach your desired sweetness.
You may not need sugar if you select an apple cider or juice that’s already quite sweet.
Total calories will depend on the apple juice you use.