Peeling method for green skinned walnuts

The peeling of green skinned walnuts can be treated using natural shade drying method, knife assisted method, boiling water soaking method, lime water soaking method, heap fermentation method, and other methods.

1. Natural shade drying method

Place the walnuts with green skin in a ventilated and cool place to spread out and dry, avoiding direct sunlight. After about 7-10 days, the green skin will naturally shrink and crack. At this time, wearing gloves and rubbing can peel it off. This method does not damage walnut kernels and is environmentally friendly, but it takes a long time and is suitable for situations where people are not in a hurry to eat. Attention should be paid to regularly flipping to prevent mold growth, and it should not be used during the rainy season.

2. Tool assisted method

Use a small knife to cut open the surface layer of the green skin along the longitudinal pattern of the walnut, with a depth that does not damage the hard shell. After scratching, grip the walnut with both hands and twist it in the opposite direction to separate the green skin from the hard shell. This method is highly efficient but requires control of the force. Improper operation can easily scratch fingers or damage the integrity of walnuts. It is recommended to wear cut resistant gloves and wash hands with lemon juice in a timely manner after handling to remove the green skin stain.

3. Boiling water soaking method

Put walnuts in boiling water and cook for 3-5 minutes. After heating, the green skin will soften the fibers. Immediately immerse in cold water after removal, and use the principle of thermal expansion and contraction to separate the green skin from the hard shell. This method thoroughly peels and can kill bacteria, but high temperatures may affect the taste of walnut kernels. Suitable for situations where a large amount of walnuts need to be processed quickly, and after processing, they should be dried in a timely manner to prevent mold growth.

4. Lime water soaking method

Mix quicklime with water at a ratio of 1:20, precipitate, and soak walnuts in the upper clear solution for 8-12 hours. Alkaline solution can decompose pectin substances in green skin. After soaking, wear rubber gloves and rub to remove the skin. This method has high efficiency and minimal residual green skin, but it is necessary to avoid contact between lime water and eyes. After treatment, walnuts should be repeatedly rinsed with clean water.

5. Heap composting method

Walnuts are stacked in a damp environment covered with straw or plastic cloth, and the green skin is decomposed by microbial fermentation. After 3-5 days of flipping walnuts, the rotten green skin is easily washed away by water guns. This method is suitable for large-scale processing, but it may produce odors and may affect the storage period of walnuts. When operating, it should be kept away from the living area, and rotten green skin needs to be deeply buried. The peeled walnuts should be placed in a bamboo sieve or breathable container and air dried for 2-3 days, with regular flipping to ensure even drying. Walnuts that have not been consumed in a timely manner are recommended to be refrigerated and stored in gauze bags to maintain ventilation. If long-term storage is required, walnut kernels can be sealed and frozen to avoid mixing with strongly scented foods such as onions. Before consumption, check for any mold or halal flavor. The daily intake should be controlled at 20-30 grams, and those with yin deficiency and excessive fire should reduce their consumption. When dealing with green skin, it is recommended to wear an apron and gloves. If contaminated with green skin juice, it can be cleaned with vinegar or alcohol.