Austria
Chocolate balls filled with pistachio marzipan and nougat, associated with Salzburg.
Austria
I would put Mozartkugel chocolates on the list for Austria because it is the kind of thing that feels useful once you are home, not just another airport purchase. Look for a boxed version with a decent date on it, especially if you are buying it near the start of the trip rather than at the airport. The reason it works is that it gives you a quick reminder of the trip without needing to keep a fragile ornament safe forever.
Austria
This is exactly the sort of thing I like bringing back from Austria: small enough to fit in a bag, but specific enough to remind you where you bought it. Oils and vinegars work well when the bottle is small, sealed and wrapped in clothing inside checked luggage. It is also the kind of thing you can talk about when someone asks what you brought back, because there is usually a little story attached to where you found it.
Austria
Grüner Veltliner wine is worth adding because it feels like something you actually noticed while travelling through Austria, rather than a generic souvenir. Wine is a great memory of a meal, but I would wrap it carefully and only carry it when the luggage situation makes sense. The ideal version is modestly priced, not too bulky, and good enough that you would buy it again even without the holiday memory.
Austria
When I think of an easy, crowd-pleasing thing to bring back from Austria, Austrian wafers is a good pick because it does not need much explanation when you hand it over. Biscuits and dry breads are good because they survive the journey and are easy to share at work or with family. I would rate it higher when it is locally made, clearly labelled and easy to use at home, and lower when it is just tourist packaging.