This is very quick to prepare and can be used immediately after making as a glaze to drizzle on your cake or dessert. You can let it sit a few minutes and it will thicken up into a delicious and creamy frosting. Or add a little more powdered sugar to thicken it even more. I have no idea of the number of servings because it would depend on what you were using it for. So I just stuck a number in because I had to put something there. But I would probably double it for a two layer cake. But for a glaze over a cake or dessert this would probably be plenty.