Hi! I found this one a while ago... Not a big fan of bananas, but I made it for my brothers and they loved it:

http://www.free-old-time-cooking-recipes.com/drinks/banana-yogurt-oatmeal-smoothie.html

I use plain milk intead of yogurt, but only because I am feeding boys...

Here's one that I use:

1 cp almond milk
1/2 frozen banana (or fresh and add some ice cubes)
1 tbsp cacao powder
2 tbsp PB2
1 scoop protein powder (optional, I use RAW Protein Vanilla)
1 scoop Green Superfood (optional, or a handful of raw baby spinach)

If you omit the protein powder it'll reduce the calories, but you may want to add another 1/2 banana or some stevia or something.

ETA: You could also use 1 cp of vanilla greek yogurt instead of the almond milk & protein powder.

Here is a good one for a breakfast smoothie. Pretty much all you'll need in the morning.

Milk - Nonfat (fat free or skim), 1 cup
Jif - Creamy Peanut Butter, 1 tbsp (32g)
Fresh - Banana, Medium, 0.5 banana
Nesquik - Chocolate Flavor 25% Less Sugar Drink Mix , 2 tbsp

Calories Carbs Fat Protein Fiber Sugar
: 294 43 9 14 4 22

Freeze banana overnight

place all ingredients in blender and puree until smooth. If not thick enough, add a couple of ice cubes.

Enjoy!

keep your memory sharp and your your mood elevated...Dr Oz's Brain Boosting Smoothie: 1 banana, 1/4 cup blueberries, a handful of Hemp nuts, 1/2 cup apple juice and 1 cup rhodolia rosea

That sounds amazing!