Slice up your bananas into 1/2 inch disks and freeze them overnight or until they are rock hard
Put your bananas into a food processor and blend until they come together into a puree, scraping down the sides periodically
If your food processor blades are spinning but nothing is happening, press the banana mixture down into the blades with a rubber spatula. You may need to repeat this process a few times
Once the bananas have come together into a puree and there aren’t any sizable chunks, scoop the banana mixture into a mixing bowl
Add the coco powder and vanilla and, using a rubber spatula, fold the mixture together until it is mixed, smooth, and one uniform color
You can either eat the “ice cream” right away or put it in the freezer to firm up a little bit