INGREDIENTS
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2 cups unbleached all-purpose flour
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1 cup cocoa powder
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¼ teaspoon salt
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1 cup unsalted butter ( 2 sticks), room temperature
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¾ cup granulated sugar
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1 large egg yolk
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1 teaspoon mint extract
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2 bags semi-sweet chocolate chips
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1 tablespoon vegetable oil
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pinch of salt
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2 teaspoons mint extract