Ingredients
- 1 (18 1/4 ounce) box white cake mix (no pudding in the mix)
- 1 (10 ounce) can frozen margarita mix, thawed (undiluted)
- 3 egg whites
- 2 tablespoons vegetable oil
- 1 tablespoon grated lime zest
- FOR ICING
- 8 tablespoons unsalted butter, softened
- 1 (8 ounce) package cream cheese, softened
- 2 tablespoons key lime juice
- 1 teaspoon key lime zest or 1 teaspoon lemon zest
- 4 -5 cups confectioners' sugar
Directions
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In large bowl, combine cake mix, Margarita mix, egg whites and vegetable oil using electric mixer.
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Stir in lime zest; mix completely.
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Fill prepared pans 2/3 full.
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Bake according to box directions (usually 325 degrees – be sure to check box!) 22-24 minutes or until toothpick inserted in center of cupcake comes out clean.
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Cool in pan on cooling rack 5-8 minutes.
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Remove cupcakes from pan; cool completely.
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FOR ICING:.
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In large bowl, cream butter, cream cheese, juice and zest with electric mixer until light and fluffy.
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Add 4 cups confectioners’ sugar, one cup at a time; continue beating until light and fluffy.
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If icing is too thin add additional confectioners’ sugar 1 tablespoon at a time.