Wash the soybeans thoroughly and soak them well.
Boil the soaked soybeans in boiling water.
Blend the boiled soybeans and water in a blender until smooth.
Strain the blended mixture using a cheesecloth.
Add sugar and salt to the strained soy milk and mix.
Bring the soy milk to a boil in a pot once.
After cooling, add your desired ingredients.