This pistachio and orange cake recipe is a refreshing and citrusy dessert that is perfect for any time of year. The cake is made with ground pistachios, orange zest, and a hint of cardamom, giving it a nutty and spicy flavor. The frosting is a simple cream cheese frosting that is flavored with orange juice and zest, adding a tangy sweetness that complements the nuttiness of the pistachios. This cake is perfect for any occasion, from a casual brunch to a fancy dinner party.