Preheat the oven to 350°F. Line a cookie sheet with parchment paper or a silicone mat and set aside.
In a medium bowl, cream together the butter, Nutella and sugars until light and fluffy. Mix in the egg and vanilla until fully combined.
In a separate bowl, mix together the flour, cornstarch and baking soda. Slowly mix into the wet ingredients, mixing until fully incorporated. Fold in the dried cranberries and the white chocolate chips.
Using a medium cookie scoop (or your hands), form around 15 balls of dough, and place evenly spaced on the prepared cookie sheet.
Bake in the preheated oven for 10-12 minutes, or until edges have set. Depending on how you like your cookies, you can wait for the middle to fully set, or have it almost set for a more soft and chewy cookie.
Allow to cool for 10 minutes on the cookie sheet before transferring to wire racks to cool completely.