This strategy didn't work out...I still went to the grocery store and was a good hour late for the party. Fortunately, the cupcakes made that excusable!
I used Tartelette's listed recipe and switched out the listed frosting for the matching frosting from the Magnolia Bakery cookbook. I chose yellow coloring for the icing as that is Meg's favorite color to wear in the summer (I think). I don't recall liking the resulting frosting in the past, but this time it was very good. I think the trick is to be very cautious when adding the confectioner's sugar. My frosting was much softer than in the past and retained a tasty butter flavor.