One of my friends had hot chocolate in a crock pot (premade) and then had candy canes, whip cream, sprinkles, etc. to put in it. It was such a cute idea! She also had water and milk too. But I thought making the fancy hot cocoa was perfect and if people didn't want it then there was water/milk. At hers, we didn't eat the cookies, we just were given a thing to take a few cookies of each batch people brought home. I love the taste test/prize idea though - that will be fun! People will just eat (I woudl think) a small bite of each cookie, it's not like they (hopefully:) will eat a whole cookie of each kind to judge it. I would just take a cookie and cute it up into a TINY bite size for them. If you do this at 7 or later I wouldn't worry much about other food, perhaps just 2 appetizers or something to munch on that aren't sweet (cheese/cracker/fruit/etc.). HAVE FUN!