...mislim da je to to.

There are very few places in the world I have seen something like this: the United States is one of them, possibly somewhere in Europe. I think the term in Croatian implies something meant to last quite a while, at least a few years. Perhaps vacuum-tight packaging might enable this.

Croatian term (edited): trajna peciva

U Nacionalnoj klasifikaciji djelatnosti
15820 Proizvodnja dvopeka, keksa, trajnih peciva i kolača
Iz http://unstats.un.org/UNSD/cr/ctryreg/ctrydetail.asp?id=317 slijedi da se hrvatska NKD oslanja na Statističku klasifikaciju ekonomskih djelatnosti u Europskoj uniji NACE rev. 1, prema kojoj je
15.82 Manufacture of rusks and biscuits; manufacture of preserved pastry goods and cakes
This class includes:
- manufacture of rusks and biscuits and ’dry’ bakery products
- manufacture of preserved pastry goods and cakes
- manufacture of snack products whether sweet or salted
http://forum.europa.eu.int/irc/dsis/bmethods/info/data/new/c...

should be this, check out a few field specific sites, and you can find that they use this word
you know the sort of cakes such as "potica" or "kugluf" that can last for ages, or salty snacks like kviki pretzels