1. Black soybeans are usually cooked for 4-6 minutes.

2. Soak black beans for 6-8 hours before cooking, which makes them easier to cook.

3. When cooking black beans, you need to open the pot cover once in the middle to avoid boiling the black beans dry, which will cause them to boil and affect your mouth.

4. After the black beans are cooked, turn off the fire. Don't pick them up immediately. You need to stew them for another 1-15 minutes before serving them out, so as to avoid the black beans from being caught and affecting their taste.