In a small ziplock bag:
1/4 cup heavy whipping cream
1/4 cup milk
1 tablespoon sugar
1/2 teaspoon vanilla
In a large ziplock bag:
1 cup ice
1/3 cup rock salt
Directions: TIGHTLY seal the small ziplock bag and place in large ziplock bag. Shake and knead bags until you have achieved a "soft serve" type of ice cream.
Tip: Before you open the small bag to eat ice cream, run cold water over the opening to rinse the salt water away and fold the sides down to create a type of bowl.