1. Wash raw black sesame seeds first. Washing sesame seeds is a very troublesome thing, sesame floating on the water, if you are not careful, it will be washed away. I wash it like this: Prepare two large bowls, put water on them, wash sesame in a bowl, with a small slotted spoon to another bowl, then you will see some dust left at the bottom of the bowl, and then change a bowl of clean water, so that the sesame will be washed after pouring back and forth several times.
2. Soak the washed sesame seeds and brown rice in water for 8 hours, then beat them into a paste with a blender, pour them into a pot and cook them, stirring them with chopsticks to prevent sticking, simmer them for 5 minutes after boiling. Be careful that the sesame paste will splash out after boiling, do not get burned.
There is another way is to fry the black sesame seeds and rice respectively, then grind them into powder, and then eat them with boiling water into paste, which is probably sold outside like this, which is easy to eat and troublesome to do, and cooked may be on fire, so I still like the first method.