Huffington Post recommends Tonewood maple syrup

We didn't believe it until we tried it, but blitzing frozen bananas in a food processor really does transform them into a convincing alternative to soft-serve ice cream. Put the frozen fruit in the bowl of a food processor and pulse a few times to break it up. Then, run the machine for about five minutes, scraping down the bowl occasionally. Transfer to a different bowl and eat immediately or let the puree set up in the freezer for 15 minutes or until it's scoopable. Cinnamon, shaved dark chocolate or crushed, low-calorie ginger snaps make great toppings, as does maple syrup (try Tonewood Dark Amber; just a small spoonful adds the perfect amount of sweetness).