"Key Lime Cupcakes - light, fluffy cupcakes full of key lime flavor! With lime juice and zest, topped with a tangy sweet lime frosting and graham cracker crumbs...."
INGREDIENTS
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6 tablespoons unsalted butter, room temperature
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3/4 cups sugar
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6 tablespoons sour cream
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1/2 teaspoon vanilla extract
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1 1/2 teaspoon key lime zest
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3 egg whites
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1 1/4 cups (163g) all-purpose flour
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2 teaspoons baking powder
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1/4 teaspoon salt
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4 tablespoons milk
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4 tablespoons key lime juice
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3/4 cup butter
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3/4 cup shortening
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6 cups powdered sugar
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3-4 tablespoons key lime juice
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1 teaspoon lime zest
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1/4 cup graham cracker crumbs