Pistachios are an indulgent, delicious nut that is roasted and salted. These little green jewels have a deep, nutty flavor that will leave your mouth watering. With a high fat content, pistachios are also a great source of healthy fat. The flavor of pistachios also varies depending on how they are processed. Pistachios that have been roasted and salted, and then shelled, are the most common type of pistachios found in the grocery store. They have a nutty flavor with a salty, buttery aftertaste.