INGREDIENTS
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1 cup plus 2 tablespoons salted butter, cut into small pieces, cold
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1/2 cup granulated sugar
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1/4 cup light brown sugar
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1 teaspoon vanilla extract
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2 1/4 cups all-purpose flour
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6 ounces semi- or bittersweet dark chocolate, chopped (you want chunks, not thin shards)
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1 large egg
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Demerara, turbinado, raw or sanding sugar, for rolling
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Flaky sea salt, for sprinkling