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the usual sources of sugar for jelly or jam. Corn syrup and honey may be used to replace part of the sugar in recipes, but too much will mask the.Principles of jam and jelly making Three main ingredients are needed for making a good jam/jelly: Pectin: forms the gel structure which makes the jam/jelly General Instructions & Steps in Jam or Jelly Making . University of Nebraska Extension. EC 448. ianrpubs.unl.edu/live/ec448/build/ec448.pdf Jam, jellies and preserves etc., are very common products made out of 2.2.1 Principle pineapple, papaya, etc., can be used for making preserves. Besides fruit, jam contains sugar or other sweetening agents,pectin, acid and water. The sugar and acid cause the pectin to undergo a physical change, when. Jam is a product made by boiling fruit pulp with sufficient sugar to a reasonably thick consistency, firm enough to hold the fruit tissues in position. Fruits Jam is a product made by boiling fruit pulp with sufficient quantity of sugar to a reasonably thick consistency, firm enough to hold the fruit tissues in