I wanted to make a jam because some persimmons I had received became too soft.

If you use persimmons that aren't overripe, slice them thinly and let them sit for an hour after mixing with the sugar to make syrup. You do not need to add the 50 ml of water if you do it this way (you can add the water if not enough syrup formed). I used 25% as much sugar as the persimmons. Please adjust this amount to your taste. Recipe by ankobby