These pistachio cookies are ultra chewy and have an almost fudge-like texture. They’re made with just a few simple ingredients and come together in the food processor after you grind the pistachios. For an ultra-green color, use Sicilian pistachios, and don't toast the nuts. However, toasted nuts will taste amazing and give extra nuttiness to the cookies, Flourless, gluten-free, and addictively delicious! They are also quite sweet and rich.