Freeze ripe bananas by unpeeling them, wrapping them in plastic wrap and placing in the freezer until frozen hard.
Break up frozen bananas and place in blender.
Add frozen berries (strawberries, blueberries, blackberries...or any combination of them).
Pour in orange juice to cover.
Spoon in about 1/3 cup vanilla yogurt.
Let sit in blender for about 5 minutes.
Blend on high until smooth. Add more juice if neccessary.