Place your bananas and cranberries in your blender or food processor. Again, I started with about a 2:1 ratio of banana to cranberry, which is a great starting place.
Blend, using just a splash of water if needed to help blend, until smooth and super creamy!
Taste. Do you want more cranberries for more tartness, or more bananas if it's too tart? Adjust and blend again.
Eat right away or scoop into a pan and place in the freezer if you want it to be more firm. Top with your choice of toppings and enjoy!