How can I fix a batch of liquid jelly?

Here are a few ways to fix a batch of liquid jelly:

1. Recook the jelly. Bring the liquid jelly to a boil again, and then simmer it for 5 minutes, stirring constantly. This should help to thicken the jelly.

2. Add more gelatin. If you have more gelatin on hand, you can add it to the liquid jelly and then reboil it. This will help to thicken the jelly.

3. Add cornstarch or arrowroot. Cornstarch and arrowroot are both thickeners that can be used to thicken liquid jelly. Add a few tablespoons of cornstarch or arrowroot to the liquid jelly and then reboil it.

4. Add pectin. Pectin is a natural thickener that can be used to thicken liquid jelly. Add a few tablespoons of pectin to the liquid jelly and then reboil it.

5. Add fruit. Fruit can help to thicken liquid jelly. Add a few cups of fruit to the liquid jelly and then reboil it.

6. Chill the jelly. Sometimes, liquid jelly can be thickened by chilling it. Place the liquid jelly in the refrigerator and let it chill for several hours or overnight.

7. Use it in a different recipe. If you can't find a way to thicken the liquid jelly, you can use it in a different recipe. For example, you can use it to make a jelly salad or a jelly pie.