Fluffy Vanilla Cupcakes and Icing

I have an addiction to the ease of using cake box mix. In my bakery, I can't use it! I want to ensure that every item is made from scratch.

Therefore, I had to google some recipe ideas to see if I could find the perfect solution to my problem.

Tonight I am trying my interpretation of Sweetapolita's fluffy vanilla cake with whipped vanilla bean frosting: http://sweetapolita.com.

I am looking to accomplish the following tonight:

1. delicious mini cupcakes
2. a perfect layer cake 
3. delicious cake squares that can be used for petit fours and icing that can melt onto the petit fours
4. determine if this cake and icing freezes well