This pistachio and chocolate cake is a decadent and rich dessert that's perfect for a special occasion dinner party. The cake is made with ground pistachios, flour, sugar, baking powder, salt, eggs, milk, oil, and cocoa powder. The pistachios add a nutty flavor and texture to the cake, while the cocoa powder gives it a rich chocolate flavor. The cake is topped with a chocolate ganache made with heavy cream and chocolate chips. Serve this cake with a scoop of vanilla ice cream for a truly indulgent dessert.