Making your own soy milk powder takes under 60 minutes. Manufacturers of soy milk powder follow a specific process for turning soy beans into a powder. First, the soy beans undergo a washing process. Then, exposure to heat tenderizes the beans. Removal of the beans’ hulls completes the preparation process and the beans are ready for grinding. The grinding of the soy beans yields the smooth soy milk powder packaged for sale in many grocers across the nation.

Things You'll Need

Soy Milk Powder

Rinse the soybeans well to remove all of the dust. Once rinsed, drain the beans thoroughly to remove as much water as possible. Avoid using a paper towel or other cloth to dry the beans since fibers can get attached. You may choose to prepare the beans a day early and allow them to dry overnight. Though, no difference exists in soy powder results if the beans undergo rinsing, roasting and grinding on the same day.

Roast the soybeans in the popcorn machine or frying pan for browning. For roasting in the popcorn maker, stir the beans occasionally to avoid burning. When using a frying pan for roasting the beans, use high heat and stir the beans constantly. Constant stirring keeps the beans from roasting unevenly. Whether using a popcorn maker or a frying pan, 10 to 15 minutes completes the roasting process. Or do a taste test. Tender beans confirm that the roasting is complete.

Remove the beans from the popcorn maker or frying pan immediately once they appear browned. Place the roasted soy beans into the blender, coffee grinder or special grinder. A quick transfer from heat to grinder ensures the beans will grind to a smooth powder. If the beans cool before grinding, they harden, making grinding difficult. The beans must be warm. Five to eight minutes of grinding time yields smooth soy milk powder.

Transfer the soy milk powder into an airtight container. Store the powder in a dark, cool place. Use the fresh powder during the next two weeks. The soy milk powder can be added to water to make soy milk, or it can be used for desserts, smoothies or in a recipe of your choice to increase the protein content of a meal. Also, many individuals use soy powder in a warm bath for softening skin.


  • Soy powder makes a healthy addition to a diet for improving skin and hair appearance when used consistently for a length of time. High-protein soy milk powder makes a good choice for a weight loss program. Or use soy powder in homemade protein bars to take the guilt out of snacking. Homemade soy powder-based recipes yield a high-protein content and, depending on the other ingredients you choose, might be low in fats and sugars.