The $30 billion bakery industry in the United States is dominated by commercial bakeries. According to Hoover's Inc., in 2012, 50 of the largest bakeries -- such as Hostess -- account for 75 percent of the revenue. That's the bad news. The good news is that on the retail side, the largest companies generate only 15 percent of the revenue. That means, as a small business person, you have the potential to operate a successful cake business.