This recipe is a “however you like it” recipe. I usually use a mix of frozen peach, strawberry, mango and pineapple chunks. I also try to use an anti-oxidant juice like cranberry-pomegranate whenever possible. If you find this combination too sour, frozen banana chunks can be added to sweeten naturally or use a sweeter juice like grape, apple or peach.
You can also use less juice to make a more ice cream-like desert.