Preheat your oven to 350°F (175°C).

In a large bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy. Add the eggs, one at a time, mixing well after each addition. Finally, stir in the vanilla extract.

In a separate bowl, whisk together the flour, baking soda, and salt.

Gradually add the dry ingredients to the wet mixture, mixing until just combined.

Fold in the chocolate chunks and chopped hazelnuts until evenly distributed.

Using a tablespoon or cookie scoop, drop dough balls onto a parchment-lined baking sheet, spacing them about 2 inches apart.

Lightly sprinkle sea salt on top of each dough ball before baking.

Bake for 10-12 minutes or until the edges are golden brown and the centers are still soft. Cool on the baking sheet for a few minutes before transferring to a wire rack to cool completely.