prep time10 min total time 25 min serves 24 ½ cup unsalted butter, at room temperature ½ cup packed light brown sugar ½ cup granulated sugar 1 large egg, at room temperature 1 tsp vanilla extract 1 ¼ cup all-purpose flour 1 Tbsp cornstarch ½ tsp baking soda ½ tsp salt 1 ½ cup chocolate chips 1 cup lightly toasted, coarsely chopped pecans (optional)
