INGREDIENTS
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1 cup granulated sugar, divided
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6 tablespoons butter, softened
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1 large egg yolk
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1/2 teaspoon vanilla extract
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3/4 cup whole almonds, toasted
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6 ounces all-purpose flour (about 1 1/3 cups)
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1/4 teaspoon baking powder
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1/4 teaspoon salt
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3 tablespoons ice water
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10 cup fresh blackberries (about 5 [12-ounce] packages)
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3 tablespoons cornstarch
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1 tablespoon fresh lemon juice
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Cooking spray
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2 tablespoons turbinado sugar