Amylase is used to extract sugars out of starches for fermentation. Add the 4 g sachet of Alpha Amylase and keep at 50-60 degrees C overnight and your starch will be converted to sugar. Measure using a refractometer or simply taste for sweetness. Make up a soup with 4g of amylase, 15 L of water and 4 kg of a starch such as yams or rice.