First you'll need to freeze some ripe bananas, simply peel, place in a container and freeze at least overnight.

When your ready to enjoy it just juice carrots as normal, clean out juicer and then run frozen bananas through the juicer.
(i have only done this with a Champion Juicer but others might work)

Final Step, pour yourself a cup of carrot juice, scoop some of the beautiful banana ice cream on top and enjoy!