I used to work at a smoothie place and one of the popular breakfast ones consisted of milk, banana, oats, caffeine powder, honey, vanilla frozen yoghurt and ice. I've been told it was especially good when you add strawberries to it.

I personally liked the more fruity ones but as someone else said the problem with these is sugar content and drinking it makes it a lot easier to consume a lot more calories than you normally would have had you eaten it normally. Could argue it is still a better option than coffee though. I personally like drinking them still lol.