INGREDIENTS
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1 cup plus 2 tablespoons (9 ounces or 255 grams) salted butter, cold, cut into small pieces
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1/2 cup (100 grams) granulated sugar
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1/4 cup (50 grams) light brown sugar
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1 teaspoon (5 ml) vanilla extract
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2 1/4 cups (295 grams) all-purpose flour
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6 ounces (170 grams) semi- or bittersweet dark chocolate, chopped (you want chunks, not thin shards of chocolate)
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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