"The blue hue comes from a freezer staple...."
INGREDIENTS
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12 tablespoons (1 1/2 sticks) unsalted butter or vegan stick butter, such as Miyokos
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1 1/4 cups frozen blueberries (about 6 ounces)
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1/2 cup white chocolate chips, roasted, salted macadamia nuts, or a combination
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1 large lemon
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3/4 cup granulated sugar
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1/2 teaspoon kosher salt
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2 cups all-purpose flour
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1 teaspoon baking powder