Step 1: Preheat your oven to 350°F (175°C).
Step 2: In a mixing bowl, whisk together the white whole wheat flour, baking soda, salt, and cornstarch.
Step 3: In another bowl, cream together the cold butter, dark brown sugar, and granulated sugar until light and fluffy.
Step 4: Beat in the egg and vanilla extract until well combined.
Step 5: Gradually mix in the dry ingredients until just combined.
Step 6: Fold in the chocolate chips gently.
Step 7: Drop rounded tablespoons of dough onto a baking sheet lined with parchment paper and bake for 10-12 minutes.
Step 8: Allow to cool on the baking sheet for 5 minutes before transferring to a wire rack.
