A. Agar-Agar is an excellent substitute for gelatine. Flaked or powdered, this flavourless ingredient is made from boiled and pressed seaweed. Unlike gelatine, agar-agar is slightly different; you can add it to foods after boiling in little water (1:1 ratio). As a result, Agar-agar sets in about an hour. It does not require refrigeration to set.