How Long Does Chocolate Last? A Chocolate Maker's Guide to Shelf Life, Storage and Bloom

I get asked this more than any other question, usually by someone standing at an open cupboard holding something they found behind the tins. So here is the proper answer, by type, with a table if you want to skip to it, and a bit about fresh chocolate at the end.

Does chocolate actually go bad?

Not in the way milk or fish goes bad. Chocolate has hardly any water in it, and bacteria need water, so a plain bar in a cupboard will not become dangerous to you.

Instead, it goes stale. The fat oxidises, the cocoa flavour flattens out, and the texture turns waxy. It stops being a pleasure long before it becomes a problem.

The exception is anything with cream, butter, fruit or nuts in it. Those bring in water and dairy fat that genuinely can spoil, which is why a filled chocolate carries a short use-by date and a bar carries a long best-before one.

Best before or use by, and why does the difference matter?

The best before is about quality. Use by is about safety. That one distinction clears up most of the confusion about chocolate.

If you are looking at a bar with a best-before date, you have time. If you are looking at something soft with a filling and a use-by date, you do not.

How long does each type of chocolate last?

Unopened, in a cool, dark cupboard at 15 to 18°C:

Type	How long it keeps	Date on the pack
Dark chocolate, 70% and above	around 2 years	Best before
Milk chocolate	around 12 months	Best before
White chocolate	around 6 months	Best before
Filled chocolates and pralines	3 to 6 months	Best before
Fresh chocolate (ours)	4 to 6 weeks in the fridge	Use by

Halve these figures once the pack is opened. Ranges are industry figures and should be checked against your own packaging before you rely on them.

Dark lasts longest because it has the least milk fat and the most cocoa solids, and cocoa solids are full of natural antioxidants that slow the whole process down. White lasts the shortest because of the high milk solids with little anioxidant of the cocoa solids to protect it.

The reason none of it turns dangerous is water activity, which in chocolate sits between 0.3 and 0.4, far too low for microbes to get going.

Every pouch of ours is guaranteed to arrive with at least two weeks of life left. In practice, most of our customers finish the box within days, which we take as a compliment.

Can you eat chocolate after the best before date?

Yes. Best before is a quality guide, not a safety cut-off, so a bar a few months past it is perfectly safe and will simply taste flatter than it should.

Use your nose rather than the print on the packet. Cardboard or old nuts means the fat has gone over and there is no joy left in it. A proper cocoa smell means it's good to eat.

Use-by dates are the ones to respect; on our chocolates, that means the date on the pouch.

What is the white stuff on my chocolate?

That is bloom, and it is not mould. Bloom is fat or sugar that has separated and come to the surface, and it is a cosmetic fault rather than a safety one.

There are two sorts. Fat bloom is soft, greyish and slightly greasy, and it comes from temperature swings: the cocoa butter melts, moves and sets again on the outside. Sugar bloom is dry and gritty, and it comes from moisture, usually condensation forming when chocolate comes out of a fridge into a warm kitchen.

Both are fine to eat. Neither tastes the way it should, because the crystal structure that gives good chocolate its snap has been broken. Or, in our case, it's double-cracked.

How do you know when to bin it?

Bin it if you can see fuzzy mould, if it smells rancid rather than just dull, or if it is a filled or fresh chocolate past its use-by date. Everything else is a quality decision, not a safety one.

Mould on chocolate is rare and obvious: fuzzy and coloured. A flat white film is bloom, and you can eat it.

How should you store chocolate?

Cool, dark, dry, sealed, and nowhere near anything that smells. For a bar, that means 15 to 18°C, which in most British houses means a cupboard away from the oven rather than the fridge.

Cocoa butter picks up odours astonishingly fast. Chocolate kept next to coffee, spices or last night's curry will taste of them within days, so keep it in its own packaging or a sealed box.

Fresh chocolate is the opposite instruction. Ours lives in the fridge, and if you keep it in a glass jar, make sure the lid is properly on; if it is in a pouch, reseal it after every raid.

Should chocolate go in the fridge?

Long-life chocolate, generally no. A fridge is around 4°C and humid, and both work against a bar: the cold dulls the flavour and the damp causes sugar bloom on the way back out.

There are two exceptions. A genuine heatwave, when the kitchen will not stay below 20°C, in which case the fridge beats a melted box and fresh chocolate like ours, which needs the fridge as a matter of safety rather than preference.

One tip if you refrigerate a bar: bring it back to room temperature still sealed, so the condensation forms on the wrapper instead of the chocolate. And with ours, take it out five to ten minutes before you eat it. Straight from the fridge, you miss half of it.

Can you freeze chocolate?

You can, and it holds up for about six months, but people go wrong during the thaw. Wrap it tightly, freeze it, then move it to the fridge for a day and to room temperature for a few hours before you open it.

Rush it, and you get sugar bloom and a gritty texture. Chocolate does not like being surprised by temperature.

Fresh chocolate can be frozen too, if sealed airtight in one of our pouches or jars (as recommended for fridge storage).

Why do we make chocolate that only lasts a few weeks?

Because cream tastes better than the alternative, and you cannot have both.

Ninety-nine per cent of the chocolate you can buy sits on a shelf for twelve months or more. We call it long-life chocolate, because that is what it is. To last that long, it cannot contain fresh dairy, which is a flavour decision dressed up as a logistics one.

Ours is made with organic fresh cream and butter from the Cotswolds, Fino de Aroma cocoa from Colombia, wildflower honey and a pinch of Dorset sea salt. No palm oil, no preservatives, nothing to make it last. That buys us four to six weeks in the fridge instead of a year on a shelf, and it means we will never be in a supermarket aisle at ambient temperature.

There is nothing right or wrong about either one. It is just taste and choices.

What this means for you

If it is a bar, you almost certainly have longer than you think, and the date on the packet is about quality rather than safety. Trust your nose over the print.

If it is filled or fresh, respect the use-by date, keep it cold and eat it. And if you have never tried the fresh version, four to six weeks is not much of a commitment.

Frequently Asked Questions

Q: Does chocolate expire?

A: Plain chocolate carries a best-before date rather than an expiry date, so no, not in the safety sense. Filled and fresh chocolates carry a use-by date and should not be eaten after it.

Q: How long does chocolate last once it is opened?

A: Roughly half as long as unopened, so about a year for dark and six months for milk, if you reseal it and keep it cool.

Q: Can old chocolate make you ill?

A: Very unlikely with a plain bar, which is far too dry for bacteria to grow in. Fresh or cream-filled chocolate past its use-by date is a different matter, so don't risk it.

Q: Why has my chocolate gone white?

A: That is bloom, which is separated fat or sugar on the surface. It is safe to eat; it is caused by temperature or moisture changes, and it means the texture will be softer than intended.

Q: How long does fresh chocolate last compared to a normal bar?

A: Four to six weeks in the fridge, compared to about a year in a cupboard for a milk chocolate bar. The short life is the price of using real cream, not a fault.

Sources

• Puratos, What is the shelf life of chocolate products? - shelf life by type, and water activity of 0.3 to 0.4.
• Darin Detwiler, food safety expert and associate teaching professor at Northeastern University, in Northeastern Global News - two years unopened for dark, one year for milk, halved once opened.
• America's Test Kitchen, Keeping Chocolate Fresher Longer - storage temperature and bloom.