Slice the bananas into coins and lay on a piece of wax paper. Transfer to freezer and let them freeze for 1-2 hours.
Add the frozen banana slices to a food processor and process until creamy and extra smooth. This may take a few minutes. If needed, stop a few times to scrape down the bowl. After the mixture was initially mixed and in very small pieces, I had to let it thaw for about 10 minutes when my processor blade wouldn't pick up the mixture as it was too hard. If this happens to you, just wait a few minutes and try processing again.
Eat within 2-3 days. Since this ice cream has no preservatives, it is best to eat it sooner rather than later. I prefer to eat it immediately after preparing. It should be the perfect soft-serve consistency after you finish processing it.