01 -
Heat the oven to 460°F and line your baking trays with parchment.
02 -
Stir together the flour, cornstarch, salt, and baking soda in a bowl.
03 -
In a larger bowl, cream the cold butter (cut up), sugars, egg, and vanilla until blended.
04 -
Gently fold the dry mixture into the wet bowl until it's all mixed.
05 -
Toss in the chocolate chips and nuts, then stir until everything's evenly spread.
06 -
Scoop dough into small balls (about a tablespoon) and lay them on the baking tray.
07 -
Pop them into the oven for 6-7 minutes until golden on top.
08 -
Let them sit on the tray to cool; they'll keep cooking a bit as they rest.