Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper.
In a medium bowl, whisk together the all-purpose flour, baking soda, and fine sea salt. Set aside.
In a large mixing bowl, cream together the unsalted butter, granulated sugar, and light brown sugar until light and fluffy, about 2-3 minutes.
Add Nutella, the egg, and vanilla extract, beating until well combined.
Gradually add the dry ingredient mixture to the wet ingredients, mixing on low speed until just combined.
Gently fold in the mini chocolate chips using a spatula.
Using a cookie scoop, drop the dough onto the prepared baking sheet, spacing them about 2 inches apart.
Bake for 10-12 minutes, or until the edges are lightly golden.
Let the cookies cool on the baking sheet for about 5 minutes, then transfer to a cooling rack.