A box of cake mix and my favorite homemade icing:

1 cup butter
3 cups powdered sugar
2 TBLS whole milk (I use 1 TBLS of half and half and 1 TBLS of 1% milk)
1 tsp vanilla

Cream the butter until fluffy.  Add the powdered sugar and continue creaming until well blended.  Add the vanilla and milk, and blend on low speed for 2 minutes.  Add additional milk if needed.  Beat at high speed until the frosting is fluffy.
*I added 1/4-1/2 cups of cocoa powder to make chocolate icing.

Cheers to celebrations!