If the cup cakes are to be iced and smooth tops are required, bake in a moderately hot oven, at 190°C. For peaked tops, necessary for butterfly cakes, increase the heat by 10°C and place the cakes in the hottest part of oven, usually near the top of gas ovens and at the bottom of electric ovens. To make sure, check the guide for your own oven. This recipe is similar to basic butter cake but calls for extra milk.