Handmade sweet potato starch noodles

Handmade sweet potato starch noodles

　　　Starch noodles are dried starch products made from beans, tubers, and coarse grains, processed into thread-like or strip-like forms. The production of starch noodles in China has a history of over a thousand years and is carried out across various regions. They appear in grayish-white, yellow, or yellowish-brown colors as dry products. Based on shape, they can be divided into two types: round noodles and wide noodles.

Characteristics of starch noodles

　　Pure sweet potato starch noodles come in gray, yellow, or black, and vary in width from thin to thick. They are highly nutritious and, like sweet potatoes, are considered anti-cancer foods. Suitable for stewing, stir-frying, and cold mixing.

Processing method of starch noodles

　　Handmade production process: ingredient selection and starch extraction → mixing and starch slurry preparation → dough kneading → noodle extrusion in boiling water → cold water rinsing and drying → bundling and packaging.

Funnel-style production process: starch raw materials → slurry preparation → starch mixing and kneading → air bubble removal → noodle extrusion and shaping → cooking for gelatinization → cooling and noodle retrieval → cutting and hanging → cooling → freezing → thawing and drying → (pressing into blocks) packaging → final noodle product.

Common knowledge about starch noodles

Are whiter starch noodles better?

Normally, the color of good-quality starch noodles is slightly yellowish, close to the original color of starch.

　　It’s best not to buy noodles that are unusually bright, stark white, or dark in color.

Do starch noodles become better in quality the darker they get when cooked?

　　The reason sweet potato starch noodles tend to be brownish is quite simple. For example, when fresh sweet potatoes or apples are cut and initially appear white, they turn brown after being exposed to air for a while due to oxidation. The same principle applies to the color change in sweet potato starch noodles. Under normal circumstances, noodles will gradually turn whiter after cooking, just like how an oxidized apple regains some color when rinsed with boiling water. If noodles do not change color even after two hours of cooking, there may be safety concerns.

Generally, it is advisable to cook sweet potato-based starch noodles in boiling water for 15 to 30 minutes before eating. Thicker noodles may take up to 40 minutes. If cooked for longer, the noodles will absorb more water, resulting in reduced chewiness, partial swelling or breakage, and increased water-soluble solids. Continued overcooking can cause the noodles to break into small pieces and eventually lead to slight soup thickening due to high-temperature dissolution of soluble starch. If noodles do not swell or break after one or two hours of cooking, additives such as alum may have been used, posing potential quality risks.

Nutritional analysis

1. Starch noodles are rich in carbohydrates, dietary fiber, protein, niacin, and minerals such as calcium, magnesium, iron, potassium, phosphorus, and sodium.

2. Starch noodles have good flavor-absorbing properties; they can take on the taste of various delicious broths. Coupled with their naturally smooth and tender texture, they are especially palatable. Authentic green starch noodles offer most of the health benefits of sweet potatoes.

　　Nutrition information (per 100g): Calories 337.00 kcal | Carbohydrates 84.20g | Fat 0.10g | Protein 0.50g | Fiber 0.60g | Niacin 0.10mg | Cholesterol 0.00mg | Magnesium 11.00mg | Calcium 35.00mg | Iron 5.20mg | Zinc 0.83mg | Copper 0.18mg | Manganese 0.16mg | Potassium 18.00mg | Phosphorus 23.00mg | Sodium 9.60mg | Selenium 2.18μg