Learn how to make these awesome rainbow frosted cupcakes with a super quick technique! So to start off grab a large bow and a stick of warm butter and mix until smooth, then add in a cup of sugar and again mix that again until its light and fluffy. Then add in two room temperature eggs and a teaspoon of vanilla extract – and mix again! Then in a different bowl start working with your dry ingredients. Start with 1 and a half cups of flour and 1 and 3/4 teaspoons of baking soda. So just follow all the rest of the steps in the tutorial below to see how to finish off these awesome cupcakes!