Drain the juice off a quart jar of peaches into a glass measuring cup. You need 2 ½ cups total, so top up with water to make up the 2 ½ cups.
Add gelatin, whisk and let sit 5 minutes. Warm it up and add the sugar while whisking. If your peaches are really sweet you may not need to add as much, mine are not very sweet. When it's all dissolved, take off the heat and add the vanilla.
If your pot is big enough, add the peaches in. Otherwise you can use a baking dish to combine them.
When jello is set after a few hours, either slice with a butterknife to cut it into small bits or use a hand mixer to blend it.
Whip 2 cups of cream with vanilla and sugar or maple syrup if needed for sweetness.
Fold the two together and keep in fridge until you’re ready to eat.
Notes
Lasts a few days in the fridge.
Really awesome on its own or served with angel food cake!