Disclaimer: In no way is this Instructable meant to condone regularly garnishing smoothies with peanut butter cups nor with any type of candy, cookies or even small cakes.  This method was utilized in this instance for illustrative purposes only.  The author of this Instructable is in no way legally, morally or spiritually responsible for any reader who takes it upon him or herself to disregard this statement.

That being said...doesn't a frosty, chocolate, peanut butter smoothie sound fantastic?  Using almond milk, less processed peanut butter and raw cocoa powder allows for a not-nearly-as-unhealthy-as-it-sounds treat.  It's not far off from a lot of pre-packaged meal replacement and/or protein shakes and it way better (nutritional info below). 

And freezing the bananas first makes it awesome...

Ingredients
2 Cups Unsweetened Almond Milk
3 Bananas, frozen overnight and sliced before blending
4 Tbs Natural Peanut Butter
2 Tbs Raw Cocoa Powder
2 Tbs Flax Seed, ground
4 - 6 Ice Cubes
Makes Four 8-ounce Servings

Directions
Toss everything to the blender and go!

Nutritional Information - Per 8 ounce Serving
Calories                 258
Saturated Fat          1g
Poly Fat                    2g
Mono Fat                  4g
Cholesterol          0mg
Sodium            160mg
Potassium      405mg
Fiber                         7g
Sugars                   18g
Protein                      8g
Vitamin A                  6%
Vitamin C               22%
Calcium                  26%
Iron                           10%