In connection with the musical “Wicked” (showing at the Kennedy Center through Aug. 21), the Roof Terrace Restaurant (2700 F St. NW; 202-416-8555, Roofterracerestaurant.com) has added a pistachio mousse cake ($11) to its dessert menu. Available throughout the show’s run, the almond joconde sponge cake — a decorative sponge cake named after the “Mona Lisa,” which is also known as “La Joconde” in France — makes for an enchanted finish to a night at the theater.