30g black beans, 10g walnuts, 20g almonds, a pinch of salt
Rinse the black beans thoroughly and soak them for at least 8 hours.
Blanch the soaked black beans in boiling water for 5 minutes, then cool.
Blanch the walnuts and almonds in boiling water for 1 minute and remove the skins.
Put all the ingredients into a blender and add water.
Blend until smooth, then strain through a cloth to remove the solids.
Pour the finished soy milk into a pot and simmer over low heat for 5-10 minutes, stirring gently.
Let the soy milk cool and store in the refrigerator.