Luke couldn't help himself. Whenever someone ordered unhealthy food he gave them shit about it. It wasn't exclusive to just Lorelai, but he was a little harder on her because he actually wanted her to be healthy. He was kind of a local tourist stop at this point. Go to Luke's if you want to be grumped at.
"No," he said flatly and put a blueberry muffin on a plate in front of her. "I swear the blueberries won't kill you."