From: http://food.yahoo.com/blog/hungrygirl/14596/hg-s-holiday-fixes-slim-down-your-faves
HG's got a great trick for ousting that evil stuff from your chocolatey desserts. Instead of oil, eggs, and butter, simply add a can of pure pumpkin to a box of devil's food cake mix. Add nothing else. Your batter will be thick (and may give your arm a workout while you stir it!), but the result will be amazingly moist and fudgy brownies that are way lower in calories and fat. And pumpkin also adds fiber, which means you'll fill up faster. So even if you're family's fave recipe includes a peanut butter swirl or hunks of chocolate stirred in, this trick'll still slice lots of fat and calories from your batch o' brownies.