In your stand mixer bowl, add flour and powdered sugar and mix with a spoon to combine.
Add cold ghee and start mixing on low for 4-5 minutes. Your dough will look like a wet sand then it will come to a more dough form.
Increase the speed to medium low and continue mixing for another 10 minutes. By then your dough will be very creamy more like a good hummus.
Spoon the dough into a plastic wrap then freeze for 15-20 minutes until firm to handle.
Preheat your oven to 320F place an oven rack in the middle.
Divide the dough into 4 equal sections. Take one out leaving the rest in the fridge.
Scoop out a piece of the dough (11-12grams), roll with the palms of your hands and place directly on an aluminum baking sheet.
Press the top lightly to flatten and add a pistachio in the middle if you chose to.
Bake for 15 minutes and do not wait for it to change color, we need it to be pale yellow.
Let them cool down on the baking sheet for 10-15 minutes then transfer them to a cooling wire rack and leave to set completely for at least 2 hours.