Why doughnuts with alum

April 25, 2023
Soy milk doughnuts are one of the most popular breakfast items we eat, which is convenient and delicious. The production process of doughnuts to will add alum this substance, why doughnuts to add alum?

What is alum?

Alum is potassium aluminum sulfide in dodecahydrate, also known as alum or potassium alum, often used as a food improver and bulking agent, mostly in doughnuts, rice noodles and other foods.

Why alum is added to doughnuts

The main reason for adding alum to doughnuts is to make the doughnuts present a loose and porous structure and keep the doughnuts crispy and soft. The alum becomes alkaline after hydrolysis, while the alkali added to the doughnut becomes acidic, and the two react chemically in water to produce carbon dioxide gas, thus making the doughnut a porous and soft structure.

What is the effect of adding alum to doughnuts on health?

Alum contains aluminum, which may lead to excessive aluminum in the body after eating a large number of doughnuts for a long time. The main hazards are as follows: 1. affect the intestinal absorption of phosphorus, iron and calcium; 2. affect blood cells leading to anemia; 3. may lead to brain neurotoxicity, affecting intellectual development, serious cases of Alzheimer's disease, etc.

Why do some doughnuts smell like ammonia?

When making doughnuts, in addition to adding alum, you can also switch to baking soda and stinky powder (ammonia bicarbonate). When heated, the chemical reaction produces ammonia and carbon dioxide, so the fluffiness of the doughnut is better, and the doughnut is bigger and softer, but when you eat it, you can feel the ammonia odor.
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