INGREDIENTS
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2 cups all-purpose flour
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1/4 cup unsweetened cocoa powder, sifted
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1 & 1/2 teaspoon baking powder
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1 teaspoon salt
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3/4 cup unsalted butter, softened
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1 & 1/2 cups firmly packed light brown sugar
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1 large egg
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1 teaspoon vanilla extract
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1 cup semisweet chocolate chips