The ratio of starch and water to make cool powder is always 1:5. Agar powder (scientific name agar, English name agar, also known as yangcai, frozen powder, cool powder, yanqi essence.

Methods: first of all, use a cup of cool water to dissolve a cup of starch, remember that water poured into the starch should be stirred immediately after, until stirred evenly, otherwise the starch is easy to deposit. Then pour four cups of water into the pot, wait until the water boils, put a small amount of alum in the water, a little is enough. After adding the alum to the boiling water, immediately pour the water starch into the pot, the ratio of starch to water is exactly 1:5. Keep stirring the starch with a spatula, otherwise it will easily stick to the pot. When the starch in the pot becomes sticky, you can turn off the heat. Then pour them into the prepared container to cool.