In a Large Mixing bowl whip together the half and half, milk sugar and vanilla until well blended.
The pour the mixture into 1 quart I used a one gallon bag Squeeze air out of bag and seal. Then in another bag add 1/3 full of ice add the other bag with liquid mixture then start adding salt and ice until the bag with ice and salt is filled I did not have to use all of the ice and salt . Seal and close.
Shake bag for ten minutes we had multiple people shake it. After 10 minutes it will no longer be a liquid.
Solid cream mixture rest covered with ice another 5 minutes. We put the ice cream bag in the freezer, while we made the microwaveable cakes to serve the ice cream.