You find a half-open box of matzo behind the flour, the date is smudged, and you can’t remember whether it’s from this year’s seder or the last one. It still looks like matzo. But is it still good? Here is what extension and USDA guidance says about how long matzo lasts, what actually goes wrong with it, and what to do about bugs and Passover.
Does matzo go bad?
The Short Answer: Yes, but slowly. Matzo is a dry, baked cracker, so it usually goes stale before it spoils. We found no matzo row in K-State’s or Ohio State Extension’s charts. Their cracker entries give 8 months and 3 months at 70°F in a tightly closed container, without saying when that period starts. USDA says a best-by date is about quality, not safety. We’d use opened matzo within about 3 months as a quality guideline, not a tested limit, and throw it out if you see mold or insects or notice an off smell.
For a complete pantry reference, see our Food Storage Guide. For similar dry crackers, see whether saltine crackers go bad and Ritz crackers go bad.
Matzo Shelf Life: At a Glance
Unopened box
Good to the best-by date. USDA says dates are about quality, not safety
Opened box, kept airtight
Our quality guideline: about 3 months. K-State lists crackers at 8 months, Ohio State at 3, neither says from when
Whole wheat, egg or flavored matzo
May lose quality sooner depending on ingredients. No validated shorter period found
Matzo meal
No matzo meal period verified. For comparison, dried bread crumbs are 6 months at both K-State and Ohio State
Freezing
No freezer time found for matzo. Freezing at 0°F for 4 days kills pantry pests
Where to keep it
A cool, dry place, ideally below 85°F, per USDA
Leftover matzo ball soup or brei
3 to 4 days in the refrigerator, per USDA
Mold or insects
Discard it
Key Takeaways
K-State’s June 2026 pantry guide lists crackers at 8 months at 70°F if kept tightly closed. Ohio State Extension’s pantry chart lists crackers at 3 months. We found no matzo row in either, and neither says whether the period starts at purchase or at opening.
USDA says a best-by date is not a safety date, and a product handled properly should still be safe and wholesome until spoilage is evident. Check storage history and condition before using an old box.
Dry baked goods can run into moisture, pantry insects and fats going off. Purdue says paper, cardboard and plastic wrap do not stop an infestation.
Penn State Extension says stale crackers can be revived by baking at 425°F for a few minutes if they have no off-flavors, and that products with more fat may develop off-flavors faster than plain saltines.
USDA’s mold guidance lists bread and baked goods as foods to discard, because porous foods can be contaminated below the surface. It also says not to sniff a moldy item.
Three Orthodox sources we read say last year’s matzo can be used for Passover, with conditions such as no bugs and storage away from chometz. Ask your own rabbi about rit
