Blackberry Mint Ice Cream

"This ice cream recipe is fun to make in the summer months using fresh blackberries, but you can make it any time of year using frozen! There are no eggs in this recipe, and no cooking. In fact, there are only four ingredients, aside from the salt and ice needed for the ice cream maker to do its job. You won't have to heat up your kitchen to make it, and you can enjoy a tasty frozen treat when you're finished!"