INGREDIENTS
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1½ cups all-purpose flour
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½ teaspoon baking powder
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½ teaspoon salt
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1 cup (8 ounces) unsalted butter, softened
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1 cup light brown sugar
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1 cup granulated sugar
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2 eggs
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2 teaspoons vanilla extract
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3 cups old-fashioned oats
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1 cup blueberries
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1 cup powdered sugar
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juice of one lemon