Peel the bananas and cut them into 1-inch pieces.

Put them in an air-tight container, pop them in the freezer and leave them overnight until they are frozen solid.

When the banana slices are frozen solid, break the pieces apart with your hands or a spoon and put them in a blender or a food processor.

Blend until totally creamy, about 2-3 minutes.

Stop the blender every so often to push down some pieces and make sure everything is getting blended evenly.

You can enjoy the ice cream right then, or place it in an air-tight container in the freezer to harden up a bit more before scooping into bowls or cones.