170g / 3/4 cup unsalted butter, room temperature
150g / 3/4 cup soft dark brown sugar
50g / 1/4 cup granulated sugar
1 large egg
2 tsp vanilla extract
250g / 2 cups flour
2 tsp cornstarch
1 tsp baking soda
1/2 tsp salt
1 cup chocolate chips
1) In a large bowl, beat together butter and sugars until light and fluffy. Beat in egg and vanilla. Mix in flour, cornstarch, baking soda and salt. Stir just until combined. Add chocolate chips. Chill the dough overnight
2) Preheat oven to 180C / 350F and line 2 baking trays with parchment paper. Scoop about 2 tablespoons of cookie dough and roll into balls. Place on a baking tray, leaving about 5 cm / 2 inch space between each cookie so they can spread. Bake for 9 minutes or until slightly underbaked in the middle. Allow to cool completely before transferring to a plate.
Recipe adapted from here.
