Blend 80g boiled black soybeans, 250ml water, 15g roasted almonds, and a pinch of salt thoroughly in a blender.
Wash the black soybeans thoroughly and soak them for at least 8 hours.
Boil the soaked black soybeans in boiling water for 10 minutes.
Remove the skins from the boiled soybeans.
Put the peeled soybeans and water into a blender and blend until smooth.
Strain the mixture with a cheesecloth to obtain the soybean milk.
Pour the soybean milk into a pot and stir over medium heat for 10 minutes.