Indulge in your favorite foods. I know that people say splurging on junk food is bad, but if it helps improve your mood for a few moments, it is well worth it. Some foods release chemicals that target dopamine, a complex system of behavioral emotions in the brain. It is similar to adrenaline that shoots rushes of excitement throughout the body. Similarly, dopamine makes the body feel good and motivates you to stay feeling that way.
However, as a caveat, I have to say that binge eating is an activity that you never want to engage in, no matter how depressed you get. In the end, make sure you control yourself and do not gain too much weight.