Moose Drool Beer Bread in a Bottle OVER 10 YRS. OLD
I never uncapped it and was just wondering if this could still possibly be good.


Probably not... dry yeast is made up of living yeast cells that are in a dormant state, and they become active again when they'r rehydrated. Over time, they degrade and once enough of them have died you won't have enough yeast to ferment the dough. Also, flour doesn't last forever -- the shelf life of white flour is usually a year or two. So, even if the kit works in the sense that you can get the dough to rise, the bread probably wouldn't be really good.

I wouldn't waste time on a 10-year old bread kit: toss it and find a recipe for bread in a similar style that you can make with fresh ingredients.

Update:

It occurs to me that this is a beer bread recipe, and many of those are quick breads that use chemical leaveners (e.g. baking powder or self-rising flour) instead of yeast. That doesn't really change the answer, though... the flour is still going to be way past it's stopped-being-delicious-by date, and like yeast, chemical leavening agents also lose their effectiveness over time.