- 3 tablespoons sugar
- 1 cup light cream (half and half)
- 1/2 teaspoon vanilla
- Rock salt
- Place sugar, cream and vanilla in a quart-size heavy zip-top plastic bag and seal.
- Place that bag in a gallon size heavy zip-top bag. Layer ice and rock salt in the gallon bag and seal.
- Toss the bag back and forth for approximately 10 minutes.