Why are purple sweet potato buns green when steamed? Can purple sweet potatoes be eaten if they have white spots inside?

Purple sweet potatoes are rich in protein, starch, pectin, cellulose, amino acids, vitamins and various minerals. They are also rich in selenium and anthocyanins. The fresher the purple sweet potato, the more white dots and white juice there are. Purple sweet potato is a special type of sweet potato. The flesh is purple to dark purple, so it is also called black potato, purple sweet potato or purple sweet potato. Many friends are curious about why purple sweet potato buns are green when steamed? Can purple sweet potatoes with white dots still be eaten?

Contents of this article

1. Why are purple sweet potato buns green when steamed?

2. Can I eat purple sweet potatoes if they have white spots inside?

3. What can purple sweet potato flour do?

Why are purple sweet potato buns green when steamed?

This is mainly because the purple sweet potato in the steamed buns is rich in anthocyanins (natural pigments), and we usually add alkali when kneading dough, so the anthocyanins in the purple sweet potato will react chemically when they come into contact with the alkali, which will turn the steamed buns green.

When making purple sweet potato steamed buns, it is best not to add alkaline additives. You can replace them with yeast, and the buns will not turn green.

The purple sweet potato buns that have turned green have no nutritional value due to a chemical reaction.

Purple sweet potatoes are rich in protein, starch, pectin, cellulose, amino acids, vitamins and various minerals, as well as selenium and anthocyanins.

Is it ok to eat purple sweet potatoes if there are white spots inside?

Purple potatoes with white spots are still edible. The small white spots on purple potatoes are usually just the starch juice of the purple potatoes themselves. When they dry, they will form small white spots. There is no need to worry too much. Moreover, the fresher the purple potatoes are, the more white spots and white juice there are.

Purple sweet potatoes are not edible when they sprout. This process produces an enzyme that degrades starch, and toxins are produced during the degradation process. These toxins are harmful and therefore cannot be eaten.

Moldy purple sweet potatoes should not be eaten, as they can cause diarrhea.

Dyed purple sweet potatoes are not edible either. Artificially dyed purple sweet potatoes contain a lot of artificial pigments, which are harmful to the human body.

What can purple sweet potato flour do?

You can make steamed buns, fairy bean cakes, purple sweet potato bread, steamed cakes, purple sweet potato egg rolls, etc. You can make steamed buns with purple sweet potatoes, flour, yeast, sugar, salt, butter, etc. Purple sweet potatoes are a special type of sweet potato. The flesh is purple to dark purple, so it is also called black potato, purple sweet potato or purple sweet potato.

Purple sweet potato contains dietary fiber, starch, vitamins, selenium, iron, calcium, potassium, anthocyanins, glycoprotein, carotene, etc.

Flour can be divided into special first-class flour, special second-class flour, standard flour and ordinary flour according to its precision.

Flour is a powder made from wheat. According to the protein content, it can be divided into high-gluten flour, medium-gluten flour, low-gluten flour and gluten-free flour.