Yes, bad foods....But in Good portions are OK

From the WebMD site:

Bad Foods – Good Portions

Just about any “bad” food can be part of your weight loss plan if you stick to small enough portions. In fact, dietitians advise against banning your favorite treats. Depriving yourself of the foods you crave could set you up for failure. A better strategy is to set limits on quantity -- for example, one chocolate truffle a day -- and stick to them. For more hints, check out WebMd's slide show