Preheat oven to 350 degrees and line a baking sheet with parchment paper or a silicone baking mat.
In a large bowl, cream together butter and sugars. Add egg and vanilla and mix well.
In a small bowl, combine flour, cornstarch, salt, and baking soda.
Add the dry ingredients to the wet ingredients and stir until completely combined. Add chocolate chips.
Roll into 1.5" balls and insert 6" lollipop sticks. Refrigerate for 15 minutes.
Bake for 10-12 minutes until the cookies are lightly golden. Allow to cool on baking sheet for five minutes before transferring to a wire cooling rack.
Spread the cooled cookies with Nutella® hazelnut spread and top with chopped nuts, crushed pretzels, or dried fruit as desired.