That Magnolia Bakery one is really similar to the one that I posted earlier about that I didn't give the recipe for as it is more time consuming than more basic cupcakes but makes really soft fluffy ones! Mine was from the Crabapple Cupcake Bakery cookbook which is worth getting if you love making cupcakes.
I have that book...haven't had time to actually bake anything from it though...I want to try the marshmallow frosting one day