Nigella's coffee and walnut layer cake. Rose like a dream and stayed moist for days. use the cake recipe to make about a dozen cappuccino cupcakes- and top them with white chocolate frosting and sprinkled them with dark drinking chocolate.
Secret to flat cakes: wet cake strips (i., Bake Even Strips) and wrap around the cake pans. They act as an insulator to help the cake bake evenly (flat). You can also use strips of towel: drench, wrap around the pans, and bake.