Moist Chocolate Raspberry Génoise

Despite its velvety-light texture, this génoise is intensely chocolaty. The special flavor comes from the combination of high-quality chocolate in the cake and cocoa in the syrup. The glorious combination of chocolate, cream, and raspberry in the ganache makes this my favorite of all frostings. The raspberry puree adds a tangy undertone, a lingering taste of raspberry, and beautiful reddish tone to the chocolate; a high-percentage chocolate keeps it from separating. The small amount of whit