1teaspoonvanilla extract you may want to omit if you use vanilla flavored yogurt
1handful of spinach
Add all of the ingredients to the blender and blend until thick, creamy, and smooth (approximately 3 minutes). Scrape down sides of blender as needed.
Taste smoothie and add more peppermint extract if necessary. If the smoothie is too thick for you, add some more milk. Smoothie is best served immediately, but will stay good in the refrigerator, covered, for one day.
Use any yogurt you like: vanilla or plain Greek yogurt, vanilla or plain yogurt. Non-fat or low fat. If you want to be sure you don't taste the banana, use a vanilla flavored yogurt.
Use any milk you like: cow's (skim, 1%, or 2%), almond, soy, coconut.
Start with ⅛ teaspoon peppermint extract and add more as necessary. This extract is very potent, and you don't want your smoothie to end up tasting like toothpaste. I would not exceed ¼ teaspoon.
If you prefer to omit spinach, you can leave the smoothie white, add a couple drops of green food coloring, or omit peppermint extract and use a few fresh mint leaves.