Mermaid queen mocha cake flavor superstars like espresso powder, brewed coffee, and a rich chocolate coffee icing boost the traditional chocolate cake elements that go into making mocha cake. The sweet, chocolatey flavor of a mocha is well-known. It’s a cake with an aquatic motif. Sea and seaweed colors coexist in the cake’s palette. A fondant recreation of a mermaid queen makes for the cake topper.