Place the walnuts in a bowl and pour water over them. Make sure the water covers the walnuts completely (this is completely separate from the 48 fluid ounces of water in the recipe). Soak walnuts overnight in water.
Step 2
Drain the water from the walnuts. Place them in a blender and add 6 cups of water. Blend on high for 1 ½ minutes.
Step 3
Strain the liquid through a fine-mesh strainer into a large bowl. Alternatively, line a regular strainer with cheesecloth and pour the liquid through. Chill milk thoroughly and enjoy!