Carob Blondie
I get ridiculously excited when I find vegan baked goods. Yeah, it's easy to make your own, and cheaper by far--but then you have to deal with all the leftovers somehow, and not every recipe can be halved successfully. If it's something not too sweet, like muffins, I can usually manage, but I reach my limit with brownies and similar very quickly. Disposal -- er, sharing -- at the office works well, but if a new recipe turned out okay but not spectacular, I prefer not to inflict mediocre leftovers on my coworkers.
Sometimes, there's just less waste if you buy premade. ::shrug::