Yes. If the skin jelly is frozen, it can be boiled again. Frozen skin jelly will not affect the taste and nutritional value of the skin jelly. When cooking it for the second time, you only need to add appropriate water to help the skin jelly solidify. . Things to note when cooking pig skin jelly. After the high heat is brought to a boil, it needs to be reduced to low heat and simmered slowly. The white grease attached to the pig skin needs to be removed. When cooking pig skin jelly, it is best to put the seasoning on gauze. Put it in a bag or spice box for easier access.