Step-by-Step Instructions

1. 1.Prepare Grapes

   Cut unripe green grapes from their bunches and wash them thoroughly under running water.

2. 2.Separate Grapes from Stems

   Carefully separate all the washed unripe green grapes from their stems.

3. 3.Cook Grapes

   Place the separated grapes into a medium pot. Add about 1/2 cup of water to the pot. Cover and cook over low heat until the grapes become soft, approximately 10-15 minutes.

4. 4.Smash Grapes

   Once the grapes are soft, use a potato masher to thoroughly smash them in the pot.

5. 5.Add Salt

   Add about 1/2 teaspoon of salt to the smashed grapes and mix well.

6. 6.Strain the Juice

   Pour the smashed grape mixture into a fine-mesh strainer placed over a clean bowl. Use a spoon to press the pulp against the strainer, extracting as much juice as possible.

7. 7.Extract More Juice

   To extract any remaining juice, add about 1/4 cup of additional water to the pulp in the strainer and continue pressing with a spoon.

8. 8.Freeze for Storage

   Pour the extracted sour grape juice into small portion molds (like ice cube trays). Freeze the juice until solid to store it for a long time.

9. 9.Store Frozen Juice

   Once frozen, remove the individual portions of sour juice from the molds and transfer them to a freezer-safe bag for convenient storage and use as needed.