Would these ingredients work for a Gift In a Jar?
All of those ingredients should be fine.  The only thing you really have to worry about is shelf life, so make sure to buy fresh ingredients and check your expiration dates, especially on the baking powder and baking soda and the almonds.  I would just tell them to use it within a year (or the earliest expiration date).

Oh yeah, and don't put the baking powder and baking soda next to the brown sugar.  There isn't a lot of water in it, but it might be enough to cause issue.