This pistachio and chocolate cake recipe is a decadent and indulgent dessert that is perfect for chocolate lovers. The cake is made with ground pistachios, cocoa powder, and a hint of espresso powder, giving it a rich and nutty flavor. The frosting is a simple chocolate ganache that is made with heavy cream and semisweet chocolate, adding a creamy and chocolatey sweetness that complements the nuttiness of the pistachios. This cake is perfect for any special occasion, from a birthday party to a holiday celebration.