For those of you that are friends of a Wendy's Frosty (or a chocolate milk shake), here's an excellent recipe. Here's a tip: to freeze your bananas, peel them first and put them on a cookie sheet to freeze. Once frozen, store them in Ziplock (or similar) bags to use in smoothies or shakes.
3 cups water
1/4 cup carob or cocoa powder
5-6 frozen bananas
1/4 cup maple syrup, honey, agave, or dates
2 tsp vanilla
In a blender, combine water and bananas. Add carob, sweetener, and vanilla. Blend until smooth. If using carob, you can add a TINY pinch or cayenne pepper to help counteract the bitter aftertaste.