Soft chocolate chip cookies get their chewy center from a higher ratio of brown sugar to white and a careful watch on bake time — pull them out while the middles still look slightly underdone. Semi-sweet chips are used throughout for balanced sweetness. The whole batch comes together in under 30 minutes, start to finish.
Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
In a mixing bowl, cream together the softened butter, brown sugar, and granulated sugar using an electric mixer on medium speed until light and fluffy (around 2 minutes).
Add the vanilla extract and egg, and mix until combined.
In a separate bowl, whisk together the sifted flour, cornstarch, baking soda, and salt.
Gradually add the dry ingredients to the wet ingredients, mixing gently until just combined. Do not overmix.
Fold in the chocolate chips with a spatula, ensuring even distribution.
Scoop tablespoon-sized portions of the dough onto the prepared baking sheet, spacing them two inches apart.
Bake for 9-11 minutes or until the edges are just starting to turn golden. The centers should remain soft.
Allow the cookies to cool on the baking sheet for 5 minutes before transferring them to a cooling rack to cool completely.
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Notes
For a deeper flavor, consider browning the butter before using it. Allow it to solidify again after browning.
If you prefer, you can use dark chocolate chips for a richer taste.
Ensure all ingredients are at room temperature to achieve the best texture.