Can you at least post a link to the kit? Any why are you looking 'to add' anything to it? What is missing?
I looked at the Brewer's Best website. They do NOT post the recipe online like they do for most of their other recipes. So we do need your help before we can help you.
Don't worry, people. I got this! http://www.brewersbestkits.com/pdf/1049 2013 Holiday Ale Recipe.pdf The answer is one pound of date sugar. and a second pack of yeast.
Hijacking this thread a little bit here: did anyone notice this warning on that recipe? "When consumed, hops can cause malignant hyperthermia in dogs, sometimes with fatal results." That's the first that I've ever seen that warning about dogs.
I knew hops were bad for dogs, but I never saw a warning on a recipe. That being said, I have 3 dogs and they never touched my homegrown hop plants. They probably know better instinctually, at least while growing in the yard, unless/until the hops are dumped outside after the boil, saturated with sweet wort.
Spent hops would certainly be more tempting to a dog. Either way, they can be fatal. There is some variation with individuals and breed. Apparently greyhounds are very susceptible (I looked into this when I was adopting a dog, although I ended up getting a good old fashioned all-American mutt).
The spice pack poses problems. It doesn't say what is in it, and potency can be really variable among spices. My spiced homebrew was awful, although I did have some success with a spiced mead. I think the key to spices is to add a little at a time until the flavor gets to where you like it. You can always add more, but you can't subtract. Making a spice tincture and gradually introducing that might be the way to go. One of my favorite holiday spice beers has been Sam Adams Old Fezziwig. It's been a while, but I believe it had some orange in it.
