Well, I never tried the Jamba Juice Original Peanut Butter moo'd, but i recieved the recipe from an american friend who's older sister works there...
Its yummy :]
Add half a cup of milk to your Blender/smoothie Maker.
Put 3 Level tbsps of peanut butter into the milk, (i prefer smooth, otherwise you are left with the lumps at the bottom of the smoothie - but i guess its all about what you like)
Add HALF a chopped and peeled ripe banana...(not a black banana...but ripe with flavour)
Sprinkle 2 level tbsps of drinking chocolate mix into the blender, and put the lid on tightly.
Blend. (DUH) until you have no lumps left.
Put into a cup and enjoy!! Yummy :] hope you like it! xxxxxxx