Chocolate Chip Skillet Cookie Recipe

Name: Chocolate Chip Skillet Cookie Recipe
Prep time: 35 min
Cook time: 45 min
Total time: 80 min
Yield: 16
Ingredients: 8 ounces unsalted butter (2 sticks; 225g), soft but cool, about 65°F (18°C), plus more for greasing skillet; 4 1/2 ounces white sugar (2/3 cup; 125g); 8 ounces light brown sugar (1 cup, gently packed; 225g); 1 ounce malted milk powder (about 1/4 cup; 25g); see note; 1/2 ounce vanilla extract (1 tablespoon; 15g); 2 teaspoons (8g) Diamond Crystal kosher salt; for table salt, use about half as much by volume or the same weight; 1 teaspoon baking soda; 1/2 teaspoon baking powder; 1/8 teaspoon grated nutmeg; 1 large egg (about 1 3/4 ounces; 50g), straight from the fridge; 12 1/2 ounces all-purpose flour, such as Gold Medal (2 3/4 cups, spooned; 355g); 12 ounces assorted dark, milk, or white chocolate (not commercial chips), roughly chopped (about 2 cups; 340g)