Allow the fruit to sit out on the counter for 5-10 minutes. (The package directions say you can also put it in the microwave for a minute or two, but I don't recommend this as a microwave can give you very inconsistent results)
Put the bananas and cherries through the Yonana's machine and into a medium to large mixing bowl.
Add the extract and stir everything together.
Note: This can also be done in a food processor, but the consistency may be a bit more fluid as you may need to add a small splash of milk or water to keep things moving.
Please note that the nutrition data below is a ballpark figure. Exact data is not possible.