INGREDIENTS
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1/2 cup plus 1 tablespoon unsalted butter
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1 cup sugar
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2 eggs, separated
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2 cups all-purpose flour
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1 teaspoon baking powder
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2/3 cup milk
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2 tablespoons grated lemon zest or 1/2 cup glaceed lemon peel
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1 tablespoon caraway seeds
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1 teaspoon vanilla extract