Step 1

Combine the sugar, half and half, and flavoring of choice in a pint-size bag, removing the air and sealing tightly.

Step 2

Place the rock salt and ice in a gallon-size Ziploc bag. Place the sealed, pint-size bag with the ice cream ingredients inside the gallon bag and seal.

Step 3

Shake until ice cream hardens (about 5 minutes).