Instructions
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Step1Heat oven to 325°F. Place paper baking cup in each of 18 regular-size nonstick muffin cups.
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Step2In large bowl, mix cake mix, 1 cup rum, the water, oil and eggs with whisk until blended. Divide batter evenly among muffin cups.
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Step3Bake 15 to 20 minutes or until toothpick inserted in center comes out clean. Remove from muffin cups to cooling rack. Cool completely, about 45 minutes.
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Step4In medium bowl, mix butter, sugar, milk and 1 teaspoon rum with electric mixer on low speed 30 seconds. Beat on medium-high speed until well blended and fluffy, scraping down side of bowl as necessary.
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Step5Frost cooled cupcakes. Sprinkle tops with coconut.