How to make tofu that is tough and smooth

The key to making tofu tough and smooth in taste lies in the selection of coagulants, temperature control, and pressing process. There are mainly methods such as selecting high protein soybeans, adjusting the proportion of coagulants, controlling the temperature of the slurry, extending the coagulation time, and optimizing the pressing force.

1. High protein soybeans

When making tofu, choose soybean varieties with high protein content, as protein content directly affects the elasticity and structural compactness of tofu. When soaking soybeans, it is necessary to ensure sufficient water absorption and swelling, usually soaking for 8-12 hours, which can be shortened to 6 hours in summer to avoid fermentation. It is recommended to use fine grinding process to fully release protein during pulping, and the concentration of soybean milk should be controlled at 10-12 baume degrees.

2. Ratio of coagulant

Traditional brine tofu uses magnesium chloride or calcium sulfate as coagulant. It is recommended to add 2-3 grams of brine per kilogram of soybean milk. The amount of calcium sulfate in gypsum tofu can be slightly more, about 3-4 g/kg soybean milk. When using gluconic acid lactone in tofu, it should be added in a ratio of 0.2% -0.3%. Mixing brine and gypsum can balance toughness and water retention, with a ratio of 1:2 being optimal.

3. Pouring temperature

The temperature of soybean milk directly affects the protein coagulation effect. The appropriate temperature for brine and gypsum is 75-80 ℃ and 85-90 ℃ respectively. Low temperature can cause incomplete solidification and loose structure, while high temperature can easily make tofu rough. After pouring, it is necessary to let it stand for 15-20 minutes to fully solidify, and avoid stirring or vibration during this period.

4. Solidification time

Extending the coagulation time helps to form a denser protein network structure. Conventional tofu takes 30-40 minutes to solidify, while high toughness tofu can be extended to 1-1.5 hours. The use of staged coagulation method yields better results. Firstly, 80% coagulant is used for initial setting, and after 20 minutes, the remaining coagulant is added to continue coagulation.

5. Pressing process

The final texture of tofu is determined by the pressing force and time. Ordinary tofu needs to be pressed with 5-10 kilograms of pressure for 30 minutes, while high toughness tofu needs to be pressed with 15-20 kilograms of pressure for 1-2 hours. Adopting a gradual pressurization method, the initial pressure should be small and gradually increased to the target pressure after 20 minutes. Soaking in cold water immediately after pressing can enhance elasticity.

When making high-quality tofu, attention should also be paid to water quality selection. It is recommended to use purified water with moderate hardness. Soak in light salt water and refrigerate during storage, which can maintain the same taste for 2-3 days. For daily consumption, try pairing tofu with fresh ingredients such as mushrooms and seafood, which can enhance the flavor and supplement high-quality protein. For people with weak digestive function, it is recommended to cut tofu into pieces and blanch them in water before cooking to reduce gastrointestinal discomfort.