i tried it this morning with my chocoate whey/casein blend.
250ml of milk - 30g scoop of protein + teaspoon of coffee.
it tasted nice, but not great, something was missing

i normally take sweetners in my coffee so perhaps thats what was missing - i'll try again tomorrow.
the other option is to try the scoop in a normal cup of coffee and milk - i'll try this the day after.