Place 5 first ingredients to a food procesor and pulse tillpistachios are ground and everything is mised. Keep aside.
Place butter in a stand mixer and mix on medium for 3 minutes with the paddleatachment. Add the sugars and mix for another 3 minutes on low.
Add olive oil and scrape the sides of the bowl with a spatula.
Incorporate the olive oil by mixing for 2-3 minutes.
Add the egg and vanila. Mix.
Add the flour mixture and just mix for a few seconds tillis all combined.
Remove the dough, flatten it and wrap it in cling film,placing it in the fridge for a night.
Next day preheat the oven at 170 celsious fan forced.
Layer two baking dishes with parchment paper.
With the help of some flour and a rolling pin slowly turnhalf of the dough in a disc with a 5-6 mm thickness. Will be hard as dough is crumbly.. but you will make it.
Cut 5 cm diameter cookies and place them on the pan using aspatula.
Bake for 12 minutes.
Leave them to cool on a rack.
Continue with the rest of the dough.