Agar Agar Powder is a natural additive is prepared from several species of red algae. It is a vegetable gelatin, one with high gelling properties. The basic Agar Gel recipe is 2 teaspoons of powder to 2 cups of liquid. Soak the agar in the liquid for about 10-15 minutes. Bring to a boil and simmer stirring until the agar completely dissolves (about 5 minutes). Store in a cool, dry place.