Looking for pistachio cookie recipes? Caster sugar – I used a little amount enough to add a very slight sweetness. Pistachio paste – You can use any pistachio paste which has a moist texture enough to bind with flour. Dark chocolate – I used dark chocolate becuase it compliments the pistachio flavour well. You’d likely need to buy it off of the internet and have it shipped to your house. Eliminate this if you want to avoid sugar. Pistachio flour is incredibly expensive and not typically found in stores. https://www.alsothecrumbsplease.com/easy-pistachio-cake-recipe-from-scratch This is optional to add but it does give a nice flavour. Pistachio flour adds a velvety mouthfeel and buttery texture to baked goods, and toasts up like caramelized gold when sprinkled on baked confections. These premium qualities, however, come at a premium price, as any pastry chef will tell you -- yet another reason you should make your own pistachio flour. You certainly can buy pistachio flour if you’d like, however I wouldn’t recommend it. Our most trusted Pistachio With Flour recipes. Recipe FAQs Can I Buy Pistachio Flour? Allrecipes has more than 20 trusted pistachio cookie recipes complete with ratings, reviews and cooking tips. Reviewed by millions of home cooks.