Easy Rainbow Cupcakes with Vanilla Frosting – Sugar Geek Show

Name: Easy Rainbow Cupcakes with Vanilla Frosting – Sugar Geek Show
Ingredients: 1 box white cake mix (I like Duncan Hines); 1 cup all purpose flour; 1 cup granulated sugar; 1/4 teaspoon salt; 1 cup sour cream (room temperature); 1/2 cup unsalted butter (melted); 1 cup milk (room temperature); 3 large eggs (room temperature); 6 bottles gel food coloring: red, orange, yellow, green, blue, purple (2-3 tsps of each color); 6 ounces pasteurized egg whites ((from a box)); 24 ounces powdered sugar; 1 Tablespoon vanilla extract; 1/2 teaspoon salt; 24 ounces unsalted butter (softened)

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Rainbow Cupcakes that are vibrant on the inside and adorable on the outside. An easy St. Patrick's Day treat from a one-bowl doctored box mix.

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Ingredients

1 box white cake mix (I like Duncan Hines)
1 cup all purpose flour
1 cup granulated sugar
1/4 teaspoon salt
1 cup sour cream (room temperature)
1/2 cup unsalted butter (melted)
1 cup milk (room temperature)
3 large eggs (room temperature)
6 bottles gel food coloring: red, orange, yellow, green, blue, purple (2-3 tsps of each color)
6 ounces pasteurized egg whites ((from a box))
24 ounces powdered sugar
1 Tablespoon vanilla extract
1/2 teaspoon salt
24 ounces unsalted butter (softened)