1, alkali cooking method: boil half a pot of water with edible alkali, put the water into the sea after boiling, and add a teaspoon of edible alkali. Because kelp contains special ingredients, it will expand when heated. After adding kelp, turn off the heat. At the same time, it should be noted that kelp should be turned over at any time to make it evenly heated. After cooking, soak kelp in clear water, cool, clean and take it out.
2, vinegar method: add vinegar when cooking kelp, just 15 minutes can make kelp soft quickly.