Jelly and jam are different things. Jam is cooked crushed fruit (with sugar), jelly is gelatinized fruit juice (with sugar) but is called Jell-o in the United states (US Jelly is jam without the fruit pulp). And to make matters more confusing we have conserve. Conserve is a whole fruit jam made of one or many fruits cooked with sugar. Making conserve is harder than jam or jelly, as the fruits must remain in their whole shape through the cooking process. Oh – and did you know that gelatine is made from the hooves of animals?