What you want to do is add some frozen fruit to a blender/food processor and then cover them with the milk. It helps if the milk was refrigerated as it will be thicker.
If you don't have a very good blender, you might need to add more of the milk to get it all to blend properly, making it more like a milkshake consistency.
I was using my Nutri Bullet, and the trick is to shake it a it when blending so it is able to blend a thicker consistency food like this.
We found this to be plenty sweet, but depending on the fruit you use, you may want to add a sweetner of choice.
In hindsight adding a little chocolate into my cherry ice cream would have been delicious! You can just add a piece of a chocolate bar and the blender will chop it up into tiny little chocolate specks that will be dispersed through your ice cream, yum!
Here is my result, I am holding the cup sideways to show that is it not liquidy and does not drip out. It is very similar to soft serve ice cream or maybe a very thick milkshake.
This is a great and simple treat to whip up on hot summer days, try using a frozen banana and pineapple for a pina colada ice cream. You can add in all sort of things, chocolate, cookies, even a little avocado to force your kids to secretly eat a little veggies :) The possibilities are endless!