Remember this amazingly creamy ice cream with just one ingredient? Here, for those of you asked, are step-by-step instructions for making super-creamy, super-easy ice cream from just one thing. That mystery ingredient, of course, is banana! The smidgen of fat in bananas makes a magic trick when they are frozen and blended up. They turn creamy instead of crumbly, with a smooth texture any home ice cream chef would love to have in their frozen treats.