"[Photograph: Emily Dryden] Thanks to the magic of cast iron, classic chocolate chip cookie dough bakes up extra chewy and crisp around the edges. With a few teaspoons of malted milk powder for an extra layer of flavor, it's a rich and chocolaty dessert just begging for a scoop of ice cream—or at least a glass of milk...."
INGREDIENTS
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8 ounces unsalted butter (2 sticks; 225g), soft but cool, about 65°F (18°C), plus more for greasing skillet
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4 1/2 ounces white sugar (2/3 cup; 125g)
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8 ounces light brown sugar (1 cup, gently packed; 225g)
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1 ounce malted milk powder (about 1/4 cup; 25g); see note
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1/2 ounce vanilla extract (1 tablespoon; 15g)
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2 teaspoons (8g) Diamond Crystal kosher salt; for table salt, use about half as much by volume or the same weight
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1 teaspoon baking soda
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1/2 teaspoon baking powder
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1/8 teaspoon grated nutmeg
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1 large egg (about 1 3/4 ounces; 50g), straight from the fridge
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12 1/2 ounces all-purpose flour, such as Gold Medal (2 3/4 cups, spooned; 355g)
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12 ounces assorted dark, milk, or white chocolate (not commercial chips), roughly chopped (about 2 cups; 395g)