What main ingredients are in jelly?

* Fruit juice: This provides the flavor and color of the jelly.

* Sugar: This provides sweetness and helps to set the jelly.

* Pectin: This is a natural gelling agent found in fruits that helps to solidify the jelly. It's usually added as powdered pectin or liquid pectin.

* Acid: This helps to activate the pectin and improve the setting of the jelly. Common acids used are lemon juice, citric acid, or tartaric acid.

In addition to these main ingredients, some recipes might include:

* Water: To adjust the consistency of the jelly.

* Flavorings: Such as vanilla extract, spices, or other fruits.

* Coloring: To enhance the color of the jelly.

The specific proportions of each ingredient will vary depending on the type of fruit, the desired consistency, and the recipe being used.