Line a baking sheet with parchment paper and set aside.
In the bowl of a stand mixer, beat together butter, cream cheese, brown sugar, white sugar, egg, and vanilla extract for 4-5 minutes.
Add in flour, cornstarch, and baking soda and beat again just until combined.
Fold in the chocolate chips and use a cookie scoop to scoop dough onto the parchment lined pan. Loosely cover with cling wrap and chill in the fridge for at least 2 hours.
When ready to bake, preheat oven to 350F and bake for 8-9 minutes.
Let cool slightly on the baking sheet before transferring to a wire cooling rack to cool completely.
ENJOY!