... sugar, sodium metabisulfite (or sodium bisulphite), sodium bicarbonate (baking soda), and ammonium bicarbonate(NH4HCO3) in high, medium, and normal ... quality biscuit making (such as thin biscuit, soda biscuit, sand cake,and waffle) withfine flour, standardizedfolur, and ... possible in order to facilitate enzyme reaction;4. In soda biscuit making, the product should be added for two ...