How do you keep chicken burgers from falling apart? Avoid overmixing the burger mixture. Don't flip the chicken patties more than once. How can I avoid a dry chicken burger? My top tip for avoiding a dry burger is to grate an onion directly over the bowl of mixture. The juice from the onion will help create a juicer burger. If you are using leaner meat, adding a healthy fat, such as olive oil, helps to create moisture in the burger.