Preheat the oven to 350F and grease a 10 inch skillet.

In a small bowl, sift and combine the flour, baking soda and salt.

Using a stand mixer with the paddle attachment, beat butter, brown sugar and granulated sugar until creamy. Add in tahini and vanilla until smooth.

Add in eggs, one at a time and beat until creamy and fully combined.

Slowly add in the flour mixture, 1/2 cup at a time.

Fold in the chocolate chunks and mini pretzels.

Pour the batter into greased skillet. Dollop nutella onto the cookie dough and make swirls to spread evenly.

Bake for 25-28 minutes or until the center comes out mostly clean. Melted chocolate is ok!

Remove from the oven and sprinkle sea salt flakes on top. Allow to cool for a couple of minutes before digging in.

Add vanilla ice cream if desired.