Wash the soybeans thoroughly and soak them in water for at least 8 hours.
Remove the skins from the soaked soybeans.
Blend the peeled soybeans with water in a blender until smooth.
Strain the mixture through a sieve to separate the soy milk.
Pour the soy milk into a pot and bring to a boil.
Once it starts boiling, remove the foam and let it boil for another 5–10 minutes.
Let the soy milk cool to finish.