Choc-Hazelnut-Stuffed Chocolate Chip Muffins

Name: Choc-Hazelnut-Stuffed Chocolate Chip Muffins
Yield: 24
Ingredients: 3 ½ cups flour; 1 tablespoon baking powder; 1 ½ teaspoons kosher salt; 1 stick butter, softened; 1 cup sugar; 1 cup brown sugar; 3 eggs; 2 teaspoons vanilla extract; 1 ⅓ cup whole milk; 1 ½ cups bittersweet chocolate chips; 1 cup hazelnuts, toasted and roughly chopped; 2 cups chocolate hazelnut spread