Another possibility is you, the chicken feet you bought are not fresh enough, and they may turn black when cooked. Choose the right chicken feet when you buy them. Chicken feet are particularly white and shiny. This kind of chicken feet is very fresh.
And don't pick some chicken feet with yellow skin and hard skin. Be sure to choose something white and shiny. These chicken feet are delicious and elastic. If the color of the chicken feet is not so bright and the surface is sticky, it means that the chicken feet have been stored for a long time. Don't buy this kind. Cook the chicken feet while they are fresh. If you put it in the refrigerator for a day or two, in fact, the chicken feet have gone bad and taste very bad.
If you want to keep raw chicken feet for a long time, you can lift them and wash them, then soak them in yellow wine for about half an hour, then wrap them in fresh-keeping bags, put them in the refrigerator and let them melt automatically when you use them, so that the preserved chicken feet are fresher.
Actually, making chicken feet is very simple. Cut off the nails of the fresh chicken feet you bought, and then put them in a pot with water. Soak clear water with two spoonfuls of cooking wine for more than two hours to remove its fishy smell, then boil water in a pot, there must be cold water, put the chicken feet in, and then blanch. Blanch for about two minutes, first remove the magazine on it, then take out the chicken feet and clean them with water, so that the cooked chicken feet will not be black.