INGREDIENTS
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3/4 granulated sugar
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3/4 light brown sugar
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1 stick (1/2 cup) unsalted butter, at room temperature
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1 large egg
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2 large egg yolks
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1 teaspoon vanilla extract
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1 teaspoon baking powder
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1/4 teaspoon baking soda
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1/2 teaspoon salt
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1 1/2 cups all-purpose flour
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4 ounces milk chocolate, chopped
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4 ounces dark chocolate, chopped
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sea salt, optional