Salted Nutella Stuffed Browned Butter Chocolate Chip Cookies

Salted Nutella Stuffed Browned Butter Chocolate Chip Cookies Recipe and directions from Ambitious Kitchen, found here 

Ingredients

2 ¼ cup all-purpose flour

1 ¼ teaspoons baking soda

¼ teaspoon of salt

2 sticks (1 cup) unsalted butter (browned and set at room temperature)

1 ¼ cup packed dark brown sugar

¼ cup granulated sugar

1 large egg plus 1 egg yolk

1 ½ teaspoons vanilla extract

1 tablespoon plain Greek yogurt

¾ cup semi-sweet chocolate chips

½ cup milk chocolate chips

½ cup dark chocolate chips

1 jar of Nutella, chilled in refrigerator

Fleur de Sel or course sea salt for sprinkling

**Helpful links for how to brown butter found here and here. Make sure to let it get room temperature though. It doesn't specify in the original recipe but when I made browned butter cupcakes with the hot butter, they turned out incredibly dense. Cookies and cupcakes are very different, but I still didn't want to make the same mistake twice - so exercise caution.