So the real question is, what is the best snack for having an HP marathon. Then have a gratin or baked thin sliced potato or Lays. I chose these recipes 'cause they are easy to make and you'll just have to use few ingredients.
For the gratin, just combine cheese, cream, milk, sweetener and the mashed potato. Then bake it for 10 minutes. Then the Lays, cut it into very thin slices. Season it with salt and oil. Bake it for 15 minutes to make it crunchy and lastly powder it with cheese powder. Voila!