For the vanilla shake I make it to taste like a frappucino and its lush!!
I go to work early in the morning sometimes so I use the shaker and make up 200ml of black coffee, pop in fridge and take to work in the morning, leave in the fridge until lunch time and add the vanilla shake powder to it and it really is lovely! Tastes almost like one of the iced coffees that you would buy in the supermarket!
HTH
Caz x