Nutella-Stuffed Brown Butter Chocolate Chip Cookies

Directions

1. Line a baking sheet with parchment paper. Dollop teaspoon-sized mounds of Nutella onto the baking sheet (about 2 dozen total*) and pop in the freezer until firm, at least 2 hours.
2. Add the butter to a medium skillet set over medium heat and let it start melting. Continue cooking, swirling the pan occasionally, until the butter becomes golden brown and smells nutty. Pour the butter into the bowl of a stand mixer fitted with the paddle attachment. Allow to cool completely.
3. Whisk the flour, baking soda, and sea salt together in a medium bowl. Set aside.
4. Add both sugars to the bowl of the mixer along with the cooled brown butter. Beat on medium speed until blended. Add the egg, yolk, and vanilla, mixing until incorporated and scraping down the sides of the bowl as needed. With the mixer on low, add the dry ingredients in two additions, beating just until incorporated. Fold in the chocolate chips and mix until evenly distributed.
5. Using a medium cookie scoop (about 2 tablespoons), portion the dough into balls. Working with one ball at a time, use your thumb to create a well in the center of the ball. Add a dollop of frozen Nutella to the well then seal the cookie dough around it so it's completely enclosed. Repeat with all of the dough and Nutella.** Cover and refrigerate for at least 30 minutes or overnight.
6. When ready to bake, preheat oven to 375 degrees. Line two baking sheets with parchment paper.
7. Bake the cookies for 8-10 minutes, or until the edges are golden brown and set (the centers may look underdone). Transfer the baking sheets to wire racks and immediately sprinkle the cookies with additional sea salt. Allow to cool for a few minutes on the baking sheet then remove to the wire racks.