Personally I’ve found that “how do I stop myself from doing a Kirby impression on this junk food?” is the wrong question.
Consider asking instead, “what am I trying to get by devouring it all?” Followed by, “is there a more helpful way to meet that need?”
Me, I like to eat for sensory enjoyment/stimulation. So I use the other senses instead, with things like music or a melting wax tart or a reusable bubble wrap toy.