2. Put the cut tofu into cold water, add 1/2 teaspoons of salt (about 3g), boil the water and continue to cook for 1 min, then take out the tofu.

3. Put the fished tofu in cold water, cool it fully, take it out and drain it, and put it in a fresh-keeping bag.

4. Finally, seal the fresh-keeping bag and put the tofu into the freezer for freezing.

The method of making frozen tofu is very simple. Wash the newly bought old tofu with clear water first, and then soak it in salt water for half an hour.

6. After the tofu is fished out of the salt water, wrap the tofu with something like a fresh-keeping box or plastic wrap, and then put it in the freezer of the refrigerator. After being frozen for 24-48 hours in the cold room, the original old tofu will turn into frozen tofu, which can be taken out, thawed and cooked.