Adapted excerpt from Maida Heatter's Brand-New Book of Great Cookies (Random House, 1995). Heatter found the original recipe for these brownies in a Palm Beach, Florida, newspaper. "It came from a local deli," she remembered. She tinkered with it and, in this version, added chocolate-covered mints. "I love the way they don't melt, but form a middle layer," she noted. "I love the simple black-and-white composition. They're just gorgeous!"