Line a baking sheet with parchment paper or a silicone baking mat. Set aside.
In the bowl of a stand mixer, beat together the butter and sugars until light and fluffy. Beat in the egg and vanilla until fully incorporated
In a separate bowl, mix together the flour, cornstarch and baking soda until fully combined.
Slowly mix the dry ingredients into the wet ingredients until fully incorporated. Fold in the chocolate chips and pecans. Refrigerate for 30 minutes.
Preheat the oven to 350°F.
Roll the cookies into balls (around 1 1/2 tablespoons of dough) and place on the prepared baking sheet. Press in 2-3 caramels into each cookie.
Bake in the preheated oven for 10-12 minutes, or until the sides of the cookie are golden. Let stand stand on the baking sheet for 3 minutes, then transfer to wire racks to cool completely.