The 45-year-old actress, who has lost 20 pounds, wishes she could live on burgers and fries, reported People magazine.
"I miss everything... Burgers, fries and pizzas. Literally if I could, I would subsist on all of that," the actress said.
The former 'Will & Grace' star, who is working on a new NBC show titled 'The Mysteries of Laura', says that her new job is helping her to avoid the lure of junk food.
"Unfortunately, working 17 hours a day, you can't subsist (on that) and be a good employee," she said, adding, she has fond memories of the food she had to give up.
"It's really just about trying to stay disciplined, which has been a problem for me in the past, but so far so good," she said.
Messing, who has a 10-year-old son said she does not exercise regularly, but maintaining her "clean" diet has given her more energy.