Chocolate, raspberry, almond, cherry, citrus, apricot, honey, cardamom, and rose are just a few flavors that pair well with pistachio. If you're looking to spice up this cake, try adding my raspberry cake filling or pastry cream between the layers, or swap the icing with white chocolate buttercream or whipped cream frosting. A chocolate ganache drip and garnish of dried rose petals or fruit would also be lovely here!