INGREDIENTS
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Cupcakes
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3/4 cup butter, softened
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1 3/4 cups granulated sugar
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4 tablespoons key lime zest
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3 eggs
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1/4 cup key lime juice
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3 cups cake flour
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1 teaspoon baking soda
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1 1/2 cups buttermilk
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White Chocolate Frosting
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2/3 cup white chocolate chips
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1/3 cup whipping cream
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1/2 cup butter, softened
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1 teaspoon vanilla extract
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3 1/2 cups icing sugar