INGREDIENTS
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1/2 cup butter
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2 cups all-purpose flour
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2/3 cup sugar
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1 tablespoon grated lemon peel
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1 teaspoon baking powder
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1/2 teaspoon baking soda
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1/2 teaspoon salt
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1 cup whole or 2% milk
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1 large egg
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1 large egg yolk
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2 tablespoons lemon juice
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1/2 teaspoon vanilla extract
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1 cup blueberries