"Pizza," the actress tells PEOPLE in this week's issue. "Like Hawaiian pizza. I'm always the person that orders the pizza that everybody goes, 'Why did you order that?' "
After years of "yo-yo dieting," the actress, 36, says she's finally learned body acceptance and now embraces a lifestyle that makes her look and feel good. "It's about health and mindfulness," she adds. "Because you can have the greatest body and you can be really unhappy if that's all you're working toward."
In her new lifestyle book, Pretty Happy: Healthy Ways to Love Your Body, which is "not meant to be a tell-all, but rather a tell-true," Hudson shares how to become "healthy, strong and beautiful from the inside out," while giving readers interactive quizzes to help them jump-start their own wellness routines.
For more of Kate Hudson's interview, including an exclusive excerpt from her new book, pick up this week's issue of PEOPLE on newsstands Friday
"I think we've put so much focus on the results that everybody is forgetting to enjoy the process," she says. "And really the only way you can get there in a way that is meaningful is if you enjoy it. And everybody has a different way of finding out what that is."
Hudson says she can relate to people who struggle with body-acceptance and the desire to be healthy. "I have fluctuated [in weight] my whole life," adds the actress, who credits dancing as one activity that has helped her body confidence.
"I fluctuate at least five pounds every month. I really want to reach people that are asking, 'How do I get there?' A lot of people are quite discouraged by the process of getting healthy because one, they think they can't afford it, and two, it's daunting. I wanted to start a dialogue. Because you won't be able to even get there until you actually accept yourself and start connecting with yourself."
As the co-founder of Fabletics, the actress is hoping to inspire readers to focus on health and inner beauty. "People make excuses, 'Oh, it's genetics or this or that.' I'm not talking about aesthetics, I'm actually talking about health," Hudson says. "You can have aesthetic goals, that's one piece of the puzzle. You can see images of men or women and say, 'Oh, that's my goal, that's what I'd like to look like some day'. But that's not going to get you there in a way that embodies and encompasses what it is to really feel strong mentally and physically."
Pretty Happy: Healthy Ways to Love Your Body hits bookshelves on Feb. 16.