Preheat your oven to 350°F (175°C).

In a bowl, combine the flour, baking powder, baking soda, and cornstarch.

In a separate bowl, beat together the softened butter, cream cheese, and granulated sugar until the mixture is smooth and fluffy.

Stir in the vanilla extract and egg until everything is well combined.

Gradually add the dry ingredient mixture into the wet mixture, mixing until just combined.

Gently incorporate the chocolate chips into the dough.

Using a spoon, drop dollops of dough onto a baking sheet lined with parchment paper.

Place the baking sheet in the oven and bake for 10-12 minutes until the edges are golden.

Let the cookies cool slightly before serving.