List of ingredients:
* Sweet potato starch: 500g
* Clear water: 2,000 grams
* Gypsum powder: a little (about 20g)
* Mint water: appropriate amount
* Brown sugar: moderate amount
Production steps:
1. Mix the sweet potato starch with clear water according to the ratio of 1:4, and stir evenly until there is no granular substance.
2. Filter the impurities in the mixed sweet potato starch water with gauze, and pour off the water after precipitation. This step is to make the bean flour cake more crystal clear. If time doesn't allow, you don't have to do this step, but it will affect the appearance of the bean flour cake.
3. Grind gypsum powder into powder according to the ratio of 1 kg sweet potato starch to 1 gypsum powder, then mix it with sweet potato starch, add appropriate amount of cold water and stir it into paste until it can be linear with fingers.
4. Pour boiling water into the basin continuously, stirring while pouring, until the bean paste turns into rice soup. Then let it cool for about four hours until the bean paste freezes.
5. Sprinkle some sweet potato starch on the chopping board, take out the frozen bean flour cake slurry, cut it into thin slices with a knife, and then cook it in boiling water.
6. When eating, you can add a proper amount of mint water and brown sugar, which will taste better.
The above is the ingredient list and production steps of longnan county bean powder cake in Ganzhou City, Jiangxi Province. It should be noted that hygiene and safety should be maintained in the production process to avoid being scalded by boiling water.