A mug of Starbucks

My brother in law was recently in the hospital, and all he wanted was a cup of Starbucks -- Verona Starbucks. We are having a celebration for his birthday, so what better cake to make than a mug of Verona Starbucks. The cake is white batter, and between the layers is coffee flavored icing. So now he can drink his Starbucks and eat it too.