When Does Buckwheat Flour Go Bad? 

Fun fact – did you know that buckwheat flour doesn’t contain wheat or gluten? I know, it’s a little misleading with “wheat” in its name.

(Buckwheat flour is a pseudo-grain/pseudo cereal, meaning it has nutritional and physical properties mimicking grains without technically being a grain. Buckwheat is a type of fruit seed related to the rhubarb plant!)

So when does buckwheat flour go bad? Once opened, buckwheat flour will only last around one month in the pantry and two months in the freezer – so not long! 

We’ll cover all things buckwheat-related so you know what to look out for to ensure you’re choosing the freshest flour for your baking needs.

What is the shelf life of buckwheat flour?

There’s a lot of information out there on the shelf life of different foods – so how do you know which one to believe?

We checked with our friends at Bob’s Red Mill (they know their stuff when it comes to gluten-free flours!) to see what they say about when buckwheat goes bad. According to them, buckwheat stores best in the refrigerator for around 2-3 months, and up to six months when stored in the freezer. However, this seems to be for whole buckwheat, not buckwheat flour!

To double-check, we looked at the recommendations from the Whole Grain Council. Their recommendations are to store buckwheat flour in the pantry for one month and the freezer for two months, and whole buckwheat in the pantry for two months and the freezer for four months.

This might vary depending on the manufacturer, so you should always check the “use by” or expiration date. 

How long does buckwheat flour last after opening?

The time frames we mentioned above apply to buckwheat flour after opening – otherwise, the best-by or use-by date is the most accurate way to know how long sealed buckwheat flour lasts.

We summarized the recommendations for storing buckwheat below:

	Pantry	Fridge	Freezer
Buckwheat flour or whole grain- SEALED	Best by/expiration date on the package	Best by/expiration date on the package	Best by/expiration date on the package
Buckwheat flour – OPEN	1 month	–	2 months
Buckwheat (whole grain/not ground) – OPEN	2 months	2-3 months	4-6 months

Can you use buckwheat flour after its expiration date?

Buckwheat flour has a shorter shelf life compared to some flours, so you might find yourself with an expired bag of it when you’re in the middle of making a recipe.

Once grains (or pseudo grains, in the case of buckwheat) are ground into flour, it can speed up how quickly the nutrients start breaking down due to exposure to oxygen and light.

You can likely get away with using buckwheat flour past its expiration date if it hasn’t been very long (a few weeks or even a month or so), but the risk is that the quality and nutritional value will have declined a bit by then.

How to tell if buckwheat flour went bad

Fresh buckwheat flour should have a neutral smell, so you can tell if buckwheat flour went bad if it smells stale, sour, musty, or just “off”. If any moisture got into the flour, you might see clumps or even mold if it was stored unsealed in high humidity.

What’s the danger in using buckwheat flour after it’s gone bad?

There isn’t a lot of danger in using buckwheat flour after it’s gone bad – the most likely thing that will happen is the flavor will be off, potentially even ruining the recipe you used the buckwheat flour for. 

You’re not likely to get foodborne illness from eating old flour, but if you ate enough buckwheat flour that had truly gone bad (not just a little stale), you might get an upset stomach.

Best storage practices for buckwheat flour

• Store buckwheat flour in a tightly sealed container. This applies to whether you keep it in the pantry, fridge, or freezer.

• For best results, store buckwheat flour in the fridge after opening.

• If you don’t plan on using buckwheat flour quickly, pop it in the freezer to prolong its shelf life. 

• Since whole buckwheat lasts longer than buckwheat flour, you might consider grinding your own buckwheat flour at home, if you’re up for it!

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