Enter: Duncan Hines
Vegan Confetti Cupcakes, and Dark Chocolate Walnut Brownies made using Duncan Hines cake mixes.
Surprisingly, Duncan Hines carries a wide variety of baking mixes that can easily be made vegan with a few simple substitutions. Much to my joy, they also make a few vegan frostings.
Peta has a wonderful "Vegan Baking Cheat Sheet," which I use as a reference point when concocting delicious vegan treats - needless to say, applesauce has become a new staple in my household.