Devil's Food Cake and Funfetti icing, too

A couple of months ago General Mills announced a line of Betty Crocker gluten-free baking mixes.
Tonight, a simple trip to the Park Slope C-Town challenged me to bake a birthday cake in honor of all the Leos of our lives. The mix was simple, only three ingredients and 38 minutes later, Devil's Food Cake with Funfetti icing (artificially-flavored vanilla icing with a packet of sprinkles tucked into the lid of the perfect tub). And, it tastes exactly as I remember box cake. How did they do it?
At start, I was wary; the mix was granular, the batter watery but after plumping at 325 and topped with fluffy icing, it's perfect.
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Also, I recently was talking with a friend about how they could put powdered eggs in, but they make you use real eggs to "feel like you're cooking." Like tastybake!
YES! it was amazing.