coconut mojito cake: This extraordinary cake comes from Tessa Huff's @stylesweetca gorgeous new book, Layered. Three layers of fluffy lime cake made with freshly grated lime zest are lightly brushed with a mint rum simple syrup that is cool and refreshing. Surrounded by a creamy coconut rum frosting, each layer of this pillowy cake is topped with a tangy lime filling: a smooth swiss meringue buttercream made with lime juice and lime zest. And it doesn't stop there!