01 -
Turn on the oven to 190°C (or 170°C fan) and line three trays with baking paper.
02 -
Beat the butter and sugar together in a big bowl until the mixture looks fluffy. Crack in the egg and stir in the vanilla until smooth.
03 -
Add the flour, salt, baking soda, and cornflour. Stir until the dough just comes together, but don't overdo it.
04 -
Carefully mix in the pistachios and white chocolate chips so they're spread throughout the dough.
05 -
Use a 5cm scoop to portion out the dough onto the trays, leaving some gaps. Pop them in the oven for 11-13 minutes until the edges are lightly golden.
06 -
Let the cookies cool for a few minutes right on the tray, then transfer to a rack until completely cooled. Enjoy!