There is no dessert with breakfast. For a cs breakfast it is your entree and drink.
At BC marketplace they have egg sandwiches and you could get either a juice or a coffee and that would be 1 cs credit.
Since the rooms have fridges, I prefer to get a sandwich, bag of chips, large rice krispie treat and a juice the night before (for 1 cs credit), put it in the fridge and then have it for breakfast.