Place soybeans in a large bowl.

Cover with water and soak for at least 8 hours, ensuring they remain submerged.

Drain the soaked soybeans.

Combine the soybeans with 3 cups of fresh water in a blender.

Blend until the mixture is frothy.

Strain the blended mixture through a fine mesh bag or strainer into a large pot.

Return the soybean pulp to the blender.

Add 3 more cups of water and blend again.

Strain this mixture into the same pot.

Repeat the blending and straining process with the remaining 2 cups of water and soybean pulp.

Heat the pot of soymilk over high heat.

Bring the soymilk to a boil, skimming off any foam that forms on the surface.

Stir constantly to prevent burning or sticking.

Add sweetener or flavorings as desired after the soymilk has boiled.

Alternatively, leave unflavored for making tofu.