Gelatine (gelatin in the US): a setting agent from animal collagen that melts at body temperature. At the bar it's the slow, gentle clarifier, and the set in jelly shots.
neutral · wobbly · melts on the tongue
Kinds
Leaf
Sold by bloom grade (bronze to platinum); stick to one so recipes come out the same.
Leaf from a good supermarket or baking supplier; powder anywhere.
Worth knowing
Freeze-thaw clarification: dissolve just enough gelatine in the juice for a loose set — a few grams per litre — freeze it solid, then let it thaw in the fridge in a cloth-lined sieve over a bowl. The gelatine net holds the solids back and clear juice drips through. It takes a day or two but needs no kit, and only part of the juice is ever warmed.