I got a 6 inch square cake and 6 mini cupcakes with the above qty. You can use a 7 or 8 inch cake tin, to make the whole qty as cake. I used a hand whisk to combine the batter. I used low fat milk and low fat yogurt for the cake. I measured the yogurt after beating it well. You can also use hot milk instead of hot water for icing. I used hot water. I kept the frosted cake at room temp for 2 days in an airtight container. You can store it in fridge for 4-5 days. The cake was very moist, even when I had it straight out of the fridge, though the icing was a tiny bit hard. If you want the icing also to be soft, keep it @ room temp for 10-15 mins, before serving.