INGREDIENTS
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3/4 cup butter (1 1/2 sticks), softened to cool room temperature
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3/4 cup granulated sugar
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1/4 cup powdered sugar
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2 large eggs
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1 teaspoon vanilla extract
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1/2 tablespoon lemon zest (optional)
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2 1/4 cups all-purpose flour
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1 teaspoon baking powder
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1/2 teaspoon salt
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6 tablespoons butter, softened
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2 1/2 cups powdered sugar
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3 tablespoons milk or cream
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1/4 teaspoon vanilla extract
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Sprinkles (optional)