Thomas Keller is a very lucky man. Not only is he the only chef and restauranteur in the U.S. to be awarded three Michelin stars for two restaurants simultaneously, his two restaurants, French Laundry in the Napa Valley, and Per Se in New York City's Columbus Circle, are consistently ranked among the world's best restaurants by Restaurant magazine. ... To determine our list of America's most expensive restaurants, we examined our spending data, and looked at average check sizes based on millions of transactions done in restaurants across the country. We filtered out places like catering services and wedding venues and then ranked the most expensive restaurants by average check size.