The Seattle-based founder of this Pike Place Market staple, Kurt Dammeier, is a rule breaker when it comes to mac and cheese. “A lot of purists think it has to be made with elbows. But penne is better,” he says. His choice is chewier, with ridges that cling to the cheese. However, he credits the overwhelming success of the dish (he sells 40,000 pounds of it a year) to a signature cross between Gruyère and cheddar called Flagship, the “umami bomb that is our cheese.” He mixes a bit of Jack cheese into the dish for extra gooeyness.