Brown Butter Nutella Skillet Cookie

Ingredients

• 1/2 cup unsalted butter
• 1 1/4 cup light brown sugar
• 1 egg
• 3/4 cup Nutella
• 2 tbsp milk
• 1 3/4 cup all purpose flour
• 1/2 tsp kosher salt
• 3/4 tsp baking soda
• 1 can (14oz) sweetened condensed milk
• 2 tbsp unsalted butter
• 10oz dark chocolate chocolate chips
• 1/2 cup hazelnuts, toasted, chopped