Add butter and both sugars to a stand mixer with the paddle attachment.
Add in vanilla and egg. Mix until combined. Make sure to scrap the sides of the bowl throughout.
Meanwhile add flour, cornstarch and baking soda to a medium bowl. Whisk to combine.
Slowly add in the dry ingredients to the wet in two parts.
Fold in chocolate chips.
Portion out 12-18 cookies (depending on how big you would like them) onto a silicone lined baking sheet. Place one caramel candy inside the center of each cookie dough ball. Make sure the caramel candy is completely covered. Space cookies 2 inches apart.
Place in the oven and bake for 10-12 minutes.
Allow cookies to cool for a couple of minutes before transferring them to a wire rack to cool completely.