Try a Wonka Wakeup™
Nutella
Raw Egg
Banana
Coffee Ice Cream
It’s what blenders were made for.
Fascinating. I never would have thought to call something a milkshake if it didn’t have ice cream in it. My recipe is milk + ice cream. If I’m starting with vanilla ice cream, I’ll toss in some berries or something. Otherwise I’ll just use whatever ice cream flavor I happen to have.
Most of the time, though, I’ll do milk + banana + fruit or chocolate, which I call a smoothie.
All-purpose cream with honey and vanilla to substitute for ice cream. 
But I agree with frozen banana and honey.
Blueberries and milk make a good smoothie.
Well, there is the most obvious addition: cream. Add 1 T of cream to the smoothie and it tastes even more like a milk shake than what your using now. Works perfectly every time.