Fresh pistachios and cardamom swimming in a sea of dark Guittard chocolate. Speaking of pistachio nuts, here’s some very useful information for your next party. Iran is the largest producer of pistachios in the world, with California in close second. Pistachios are one of the oldest flowering trees in the world – they are mentioned in Genesis and were grown in the Hanging Gardens of Babylon. The Queen of Sheba was apparently a bigger fan than I am. She demanded that the entire region’s pistachio harvest be set aside just for her.