1, soaking method. First clean the dried kelp, then soak it in warm water, add half tablespoon of baking soda, soak it for about 10 minutes and gently massage the kelp. The kelp is easier to cook and soften after this treatment. Wash the soaked kelp, then put it into a pot with water and a few drops of white vinegar, bring to a boil over high heat and cook for about 15 minutes.

2, steaming method. Put the cleaned kelp into the steamer for 10 to 15 minutes, then take it out and put it into a pot, add the right amount of water, boil it over high heat and then turn to low heat and cook it for 10 to 15 minutes.

3, edible alkali cooking method. Wash the kelp with cool water, and then use rice water to soak the kelp. After soaking, wash the kelp again, add cool water and a small amount of edible alkali, boil over high heat and then turn to medium heat and cook for 20 minutes.

4, add spinach method. Add spinach when cooking kelp, because the oxalic acid in spinach can help the kelp soften quickly.

5. Use a pressure cooker. Put the kelp and other ingredients into the pressure cooker and follow the instructions of the pressure cooker to cook the kelp faster.