Do coffee beans go bad?

Do coffee beans go bad?

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  1. Yes, ground coffee does go stale. It wll stay good longer, even at room temperature, if you keep it in a glass or ceramic jar that seals tightly. Many people keep it fresh longer by keeping it in the freezer.

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  2. And if they went rancid they’re way past the time of ideal extraction. Rule of thumb is 1 day from grind, 1 week from opening package, and I think 1 month form roasting. Anything after that the coffee will already not taste as good. Correct me if I’m wrong on the times, but I think I’m pretty close.

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  3. Yes, and so does roasted coffee beans. The worst part? More expensive beans will show the rancidness more, as they will often have a higher oil content.

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  4. Coffee is perishable. The most noticeable result of brewing with beans past their prime (i.e. rancid) is the bitter aftertaste. After green beans are roasted, they go through a period of de-gassing that lasts roughly 24 hours. After that, beans have roughly two weeks before they start to taste bitter. Lighter roasted beans can last longer, but dark roasts decay much quicker, as longer exposure to heat during roasting lessens the structural integrity of the bean, exposing oils on the surface to air and moisture, where they decay quickest. To preserve the freshness of coffee:

    Store in a cool, dry, dark place, sealed against exposure to air and moisture
    Brew some time between 2-14 days after roasting
    Grind immediately prior to use

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  5. Yes.
    If left exposed in an open container, coffee beans will quickly lose their aroma and flavors acquired from the roasting process. Depending on the quality of the beans, their roast profile, and the conditions at which they are stored, some coffee will go stale faster than others. Ground coffee, having more surface area, will stale far faster.
    Generally, I keep no more than a week’s worth of coffee in the house to always keep it fresh. I always store whole beans in airtight containers, and only grind what I need, and immediately before pouring the water (I use a French press).
    While you will notice a marked decline in the flavor of coffee using stale beans, I am not quite sure how long it may take for the beans to “go bad” to the point of being dangerous to use due to mold or decomposition. This is because I’ve never leave old coffee laying around long enough to find out. Okay, I lied: there are a few loose beans in the hopper of my old unused grind-and-brew drip coffee maker, and they still appear exactly the same as they did when it went into storage 3 years ago.
    I don’t suspect that using those beans would make me sick, but the flavor of coffee produced would probably be pretty gross and not worth it.

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  6. Yes. I used to buy the idea that coffee can last for up to a year primarily because the expiry dates say so. It was only after drinking a freshly roasted coffee did I realize how much I am missing and how that bitter-to-dull taste of the 3 or 6-month old coffee beans is exactly what stale coffee taste like. This is because coffee goes through a de-gassing period as soon as it’s roasted, and will start to lose its flavor and aroma over the coming weeks. Sure, you can still brew the coffee months or even up to a year but it ain’t going to be good coffee.

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