INGREDIENTS
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1 1/2 cups all-purpose flour
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2 teaspoons baking powder
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1/2 teaspoon coarse salt
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1/2 cup (1 stick) cold unsalted butter, cut into small pieces
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3/4 cup cold heavy cream, plus more for brushing
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6 cups (3 pints) blueberries
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1/2 cup sugar, plus more if needed
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1/4 cup cornstarch, plus more if needed
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1/4 teaspoon ground cinnamon
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Sanding sugar, for sprinkling