How to make frozen pig's trotters as follows:

1. Clean and blanch the pig's trotters.

2. Put cooking wine, star anise, ginger, green onion, appropriate amount of salt, pig's trotters, and water in the pressure cooker. Start spraying hot air and then turn to medium-low heat for 15 minutes and turn off the heat.

3. After the heat has completely dissipated, take out the pig's trotters, remove the bones, and fish out other debris. Pour the bones and the soup in the pressure cooker into another pot, pour more water and sprinkle a little more. Adjust the color of the soy sauce and sprinkle some salt, cook until half of the soup is left and turns thick and milky white, turn off the heat.

4. Remove the bones, add the removed pork trotters and skin, and continue to cook until the soup is almost 1 and a half times thicker than the pork trotters. Turn off the heat, let cool and refrigerate for at least 12 hours. .

5. Take out the slices. If you feel that the texture of the jelly is not chewy enough, you can add the same amount of water and boil it again and refrigerate it again.

6. Pig's trotters jelly can be eaten directly in slices. Prepare the sauce according to your personal taste and eat it as a dip, or pour it directly on the pig's trotters jelly.