Add everything to a wide-mouth pint mason jar per your desired flavor.
Place the metal lid that comes with the mason jars (preferably not plastic lids) on your mason jar. Make sure it is closed tightly.
Mix your mason jar by shaking for 5 minutes. It should look like it has thickened.
Make sure the lid is sealed on your jar before adding to the freezer. Leave it in the freezer for at least 4 hours, or preferably, overnight.
Enjoy straight out of the jar or scooped into a bowl. Top with whipped cream, maraschino cherries, and any other fun toppings you might want to add. Enjoy!
Notes
Add a few drops of red food coloring to enhance the color of the strawberry ice cream, if desired.Make all three flavors and add a scoop of each to a bowl for Neapolitan ice cream.Keep in the freezer for up to 2 to 3 months, though it will get harder and icy over time. To fix this, let it sit out at room temperature for 5 to 10 minutes before serving and then give it a gentle stir.