Here is my report back...
They did indeed make my shakes for me in the Cove Café. I just had them make it with nonfat milk (I usually use unsweetened almond milk at home but the ship's almond milk is sweetened,) a banana, my protein powder and ice. Tasted just like home! I'm sure it did not taste as good as some of the other yummy drinks others were ordering! Hahahaha
Now the funny thing is how I was charged. The first day I was charged $0.58, the second time I wasn't charged at all and the third time I was charged $3.95. Of course I had a different person making it each time!
So did you bring the banana, or do they have fruit in Cove Cafe? (I can't remember) I normally put strawberries in mine. I'm thinking this might be a good way to balance my eating on the boat!