INGREDIENTS
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2 cups all-purpose flour
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1.5 teaspoons baking powder
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1/4 teaspoon salt
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1/2 cup butter (, softened)
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1 cup sugar
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2 eggs
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1/3 cup milk
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zest of two lemons
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1/4 cup lemon juice
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1/2-2/3 cup powdered sugar
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optional: 1/2 cups chopped walnuts