Here's your single serving of ice cream. Each bag can be personalized according to taste, with mint, chocolate, or fruit. This is a fun way to spend time with your favorite people on slow, hot days.
1 gallon-size plastic food storage bag
1 quart-size plastic food storage bag
1/2 cup heavy cream
1/2 cup milk or half-and-half
1/2 teaspoon vanilla
2 heaping tablespoons sugar
Fill the gallon-size bag 3/4 full of ice cubes and sprinkle a handful (about 1/4 cup) rock salt over the ice. In the quart-size bag, add cream, half-and-half, sugar, and vanilla. Seal the bag, removing excess air, and place inside the larger bag and seal it as well. Shake the bags vigorously (probably outside) for 5-10 minutes, or until the ice cream in the inner bag gets thick and hard. Remove and dry the inner bag to keep the saltwater out of your ice cream. Discard the larger bag. Serve immediately in a bowl or right out of the bag. (If you want a variation, omit the vanilla, and add a little chocolate (crumbled or syrup), a drop or two of mint extract, or a few slices of ripe summer fruit.)