"We recommend using the test kitchen’s favorite baking chocolate, Callebaut Intense Dark L-60-40NV, but any high-quality dark, bittersweet, or semisweet chocolate will work...."
INGREDIENTS
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1 1/2 cups (7 1/2 ounces) all-purpose flour
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1/2 cup (1 1/2 ounces) Dutch-processed cocoa
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1/2 teaspoon baking soda
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1/4 teaspoon salt
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3/4 cup (5 1/4 ounces) granulated sugar
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3/4 cup packed (5 1/4 ounces) dark brown sugar
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10 tablespoons unsalted butter, melted and cooled
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2 large eggs
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1 teaspoon vanilla extract
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4 ounces bittersweet chocolate, chopped into 1/2-inch pieces