DENNIS — Tucked away in the basement of Cape Cod Picture Framing sits a small, quirky bakery. Known for its Indigo Coffee, breakfast sandwiches, paninis and a large array of baked goods, the Underground Bakery has won over many customers who stop by for a quick bite and leave dazzled by the display of colorful cookies, baked pastries and assorted sweets. “Once you find us and walk through the doors it makes you feel cozy and comfortable and makes you want to come back again,” co-owner Laurie DeCost said. In May 2009, DeCost and her husband and business partner, Ian Sullivan, bou...