Yeah, the pause button of awesomeness is so useful! =P
If I am on a kill streak I get someone to shove a banana in my mouth. Once when my mom did that to me I was on a 13 kill streak with the ballistic knife in CoD.
I'd say either jello, mandarin oranges, or chocolate, none of them get in the way of the mouth if you are online and have to talk, cookies suck for online play, so try some of those three. Exclude the cookies.
Eat? Food? In real life? While gaming? Well, if it was a matter of life or death I may stop/pause gaming to eat. In that case I would eat just about anything.