The Complete Handbook of Soy Milk Makers

Chapter 1: Understanding Soy Milk Makers

A soy milk maker is a countertop appliance that automates the production of soy milk from dry soybeans. It replaces a multi-step manual process that traditionally involves soaking beans overnight, grinding them with water into a slurry, boiling that slurry, and then filtering out the insoluble fiber. A soy milk maker does all of this inside a single vessel, with a control panel that lets you set the program and walk away. What comes out is a fresh, hot, and unadulterated soy milk that you can drink as-is or use as a base for other products.

The core processing cycle is the same across almost all machines, regardless of price or size. First, the machine heats water to a pre-soak temperature. The dry beans are then added along with room-temperature water, and the machine begins the grinding phase. In a blade-based machine, a spinning stainless steel blade at the bottom of the jug chops the soaked beans into a fine slurry. In a stone-burr machine, the beans are fed between two abrasive discs that crush them more slowly and evenly. Either way, the resulting mixture is now a thick suspension of bean particles, water, and soluble proteins.

Next comes the boiling phase. The machine raises the temperature of the slurry to around 100 degrees Celsius (212 degrees Fahrenheit). This step is not just about making the milk hot enough to drink. Raw soybeans contain trypsin inhibitors, which block the digestion of protein, and the