1. Soak soybeans in advance, preferably the day before, soak overnight.

2. Add water and beat into soy milk.

3. Strain out the dregs of the beans, soybean milk into the pot, boil over high heat.

4. Prepare a large bowl, dissolve the lactone with a little water in the bottom of the bowl.

5. Soymilk after boiling to continue to cook for three to five minutes.

6. Once cooked, turn off the heat and let it cool for three or four minutes.

Cool to 80 - 90 degrees and wash down the inner fat with a spoonful of soy milk.

7. Then cover and after 20 minutes, the tofu brain is ready.