Blend everything in a blender (or mash the banana with a fork and mix in the other ingredients). Spread out in a thick bag and freeze.
Mash the contents of the bag every 30-60 minutes. It's ready to serve after 2 hours.
If it freezes solid because you forget to mash it, microwave for 30-40 seconds at 600W and break the crystals with a rolling pin.
[Variation] Slice the banana thinly and freeze. Mix the ingredients and make a smoothie.
Try the Cherry Yogurt Ice Cream. Recipe ID: 2278747.
Here's Rum Raisin Ice Cream. Recipe ID: 2278766.
Story Behind this Recipe
I made ice cream with ingredients for a smoothie, and it tasted absolutely delicious. I'm so hooked that it's my third time making this.
You could also make this in a plastic container, but since it takes longer and could crack when frozen, I recommend using a plastic bag. If you spread it out thinly in the bag and freeze, you can easily break off a portion to eat.