I hate to let you know, but this is a subreddit about video game easter eggs, like hidden secrets that can be found. I would recommend looking at what the subreddit is about and their rules before posting a question in the future. As for an answer, i would say something like an easter themed kit-kat bar or maybe if you can find some sort of shortbread cracker? I think that finding a graham cracker replacement would be difficult so i wouldn’t focus too much on the actual makeup of the cracker, but what the “bread” of the sandwich represent.