What is the time required to boil jam?

After that, the jam has to be cooked over a very high heat in order to get rid of as much water as possible as fast as possible and to make full use of the pectin in the fruit. (The amount of time needed to cook a fruit can vary because of the amount of water it contains, but after it reaches a rolling boil, you should plan on cooking it for at least 40 to 50 minutes.