– 2 cups (250 g) all purpose flour – 2 tsp (10 g) cornstarch – 1 tsp baking powder – ½ tsp salt – ¾ cup (170 g) unsalted butter, room temperature – 1¼ cups (250 g) granulated white sugar – 2 large eggs, room temperature (US) – 2 tsp (10 ml) vanilla extract – 2 cups (12 oz, 340 g) semi sweet chocolate chips, divided
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