INGREDIENTS
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1/4 cup (4 tablespoons) fresh basil leaves
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2 tablespoons verbena leaves (see notes)
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10 tablespoons (5 ounces/140 g) butter
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1 tablespoon vanilla extract
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1 3/4 cup (230 g) all-purpose flour (I used half whole-wheat and half all-purpose)
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3/4 teaspoon baking powder
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3/4 teaspoon baking soda
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1/2 cup (100 g) granulated sugar
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1/2 cup plus 3 tablespoons (140 g) light brown sugar, packed
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1/2 teaspoon kosher salt / fleur de sel* (plus more for sprinkling)
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1 egg
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7 ounces (200 g) bittersweet chocolate, roughly chopped (I LOVE either 85 or 70 percent — it's hard to find 60 percent in the UK, but you can use that or semisweet)