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Coffee beans are the roasted seeds of the coffee cherry, sold whole or ground for use in espresso machines, filter brewers and grinders. Quality comes down to three things: the species (arabica or robusta), the roast level, and how fresh the beans are at the point of sale. You can browse the full range on our coffee category page.
What Are Coffee Beans, Really?
A coffee bean is not a bean in the botanical sense. It is the seed inside a small red or purple fruit called a coffee cherry, which grows on a shrub in tropical highlands. Most cherries contain two seeds pressed flat against each other, which is why the typical bean has one curved side and one flat side with a crease down it.
Once picked, the cherries are pulped, fermented or dried, hulled and sorted. What comes out is green coffee: hard, grassy-smelling and more or less undrinkable. Green coffee is stable for months, which is how the global trade works.
Roasting is where the flavour is made. Heat drives off moisture, triggers the Maillard reaction and caramelises sugars, producing hundreds of aromatic compounds that did not exist in the green seed. It also makes the bean brittle enough to grind and soluble enough to brew.
Why roast date matters more than best before
A bag of beans stamped with a best before date twelve months out tells you almost nothing. Roasted coffee starts losing aroma within days, and by two months in a bag that has been opened, a good bean tastes flat and papery. Roast date is the number worth checking.
Arabica vs Robusta: What the Difference Means for Your Cup
Two species dominate commercial coffee. Arabica accounts for the majority of what is sold in the UK, and robusta makes up most of the rest. They are genuinely different plants with different chemistry, not just different grades.
| Trait | Arabica | Robusta |
|---|---|---|
| Flavour | Sweeter, more acidity, fruit and floral notes | Heavier, woody, chocolatey, more bitter |
| Caffeine | Roughly half that of robusta | Roughly double that of arabica |
| Crema on espresso | Lighter, dissipates faster | Thicker, more persistent |
| Typical use | Filter, speciality espresso, single origin | Blend component for body, crema and cost control |
Robusta has a poor reputation, largely earned by decades of cheap, badly processed lots. Good robusta in a blend does a real job, though: it holds crema together, adds body through milk and keeps the price sensible for a busy site pulling four hundred shots a day.
Most Italian-style espresso blends sit somewhere between 10 and 30 per cent robusta. Summit Italian Blend Coffee Beans (500g) at £9.50 ex VAT is a fair example of that style if you want to taste what the approach does in the cup.
Whole Bean, Ground, Instant or Capsule: Matching Format to Machine
This is where most buying mistakes happen. Format has to match the machine, and the machine does not care how good the coffee is if it cannot brew it.
- Whole beans suit bean-to-cup machines and traditional espresso machines paired with a grinder. Nothing else.
- Ground coffee is milled to a set size for filter brewers, cafetieres or pour-over. Grind size is not interchangeable between methods.
- Instant is pre-brewed and dried coffee that dissolves in hot water. No machine required.
- Capsules are sealed plastic or aluminium units for capsule machines. Each system has its own format, and capsules are not the same thing as 44mm ESE pods for traditional espresso machines.
Whole bean gives you the best flavour ceiling because grinding releases aromatics that then start disappearing within minutes. That is the whole argument for grinding to order, and it is why a decent grinder matters as much as the machine itself. Our coffee grinders range covers everything from home burr grinders to on-demand commercial units.
Where instant still earns its place
An office kitchen with no machine, a site canteen, a back-of-house urn: instant does a job that beans cannot. Kenco Millicano Americano Wholebean Instant Coffee (300g) at £16.95 ex VAT blends instant granules with finely milled roast and ground coffee, which gives it more body than standard instant.
Roast Levels and Flavour: Light, Medium or Dark
Roast level is the single biggest lever on flavour after origin. It shifts acidity, body, sweetness and how much of the bean’s own character survives the process.
| Roast | Acidity | Body | Best for |
|---|---|---|---|
| Light | High, bright | Light, tea-like | Filter, pour-over, distinctive single origins |
| Medium | Balanced | Rounded | Espresso, bean-to-cup, flat whites |
| Dark | Low | Heavy, bittersweet | Traditional Italian espresso, milk drinks, high volume |
Light roasting preserves origin character, which is why a washed Ethiopian tastes of citrus and jasmine when roasted lightly and of very little when roasted dark. If distinctiveness is what you are after, buy small and taste widely across our coffee beans packets.
Dark roasts trade nuance for consistency and punch. They cut through milk, they are forgiving of slightly sloppy extraction, and in a café serving mostly lattes and cappuccinos that matters more than a delicate blackcurrant note nobody will taste.
Between those poles sits most of the speciality market: medium roasts built for espresso, balanced enough to drink black and solid enough to survive a milk drink.
Keeping Beans Fresh: Storage That Actually Works
Coffee has four enemies: oxygen, light, heat and moisture. Get those under control and a bag of beans will hold up well for weeks. Ignore them and you will be brewing stale coffee inside a fortnight.
- Keep beans in the original bag if it has a one-way valve, rolled down tight and clipped.
- Otherwise use an airtight container that is opaque, not a glass jar on a sunny shelf.
- Store at stable room temperature, away from the machine, the oven and the dishwasher.
- Do not refrigerate. Condensation on cold beans ruins them.
- Freezing works only for sealed, unopened bags you genuinely will not touch for months.
Buy in quantities you will get through. A home user burning through 40g a day does not need a 1kg bag, and a café should be ordering weekly rather than storing a month of stock in a warm back room.
Hoppers are not storage
A grinder hopper is a feed mechanism, not a cupboard. Beans sitting in an uncovered hopper under café lighting stale quickly and leave oil residue that turns rancid. Load what you will use in a session and clean the hopper weekly.
Buying for Home, Office or Trade
What you should buy changes completely with volume and who is making the drink. The gap between a home enthusiast and a 200-cup-a-day café is not just quantity.
Home
Small bags, bought often, is the right pattern. A 500g bag lasts a couple of weeks for most households and stays fresh across that window. Experimenting is cheap at this scale, so try different origins and roast levels before settling.
Office and workplace
Consistency and simplicity beat complexity. Whoever makes the coffee at 3pm is not a trained barista, so pick a forgiving medium roast for the bean-to-cup and keep one reliable line on standing order rather than rotating stock.
Cafés and hospitality
Here you are buying a house coffee that has to work through milk, survive a busy rush and taste the same on Friday as it did on Monday. Summit Grande Crema Coffee Beans (1kg) at £16.50 ex VAT is a sensible workhorse for that kind of site.
If you would rather sample before committing to cases, the wider Summit range runs from 500g bags up to full trade quantities in the same blends, so the house coffee does not change when the volume does.
Where to Buy Coffee Beans in the UK
Buy from somewhere with enough turnover that the stock is genuinely fresh, and enough range that you can change your mind without changing supplier. We have been supplying coffee to UK trade since 1993, which means our shelves move.
Established brands still have a place, particularly where a site wants a recognised name behind the bar. Douwe Egberts Espresso Classic Coffee Beans (1kg) is listed at £75.00 ex VAT and suits sites already running on Douwe Egberts elsewhere in the business.
Orders placed before 4:30pm Monday to Friday are dispatched the same day via DPD. Delivery is free on orders over £69 ex VAT to mainland UK, next working day. All prices shown are ex VAT.
Beans are simple once you strip away the marketing. Match the format to the machine, pick a roast level that suits how the coffee will be drunk, buy quantities you will finish, and store them properly. Everything else is preference, and preference is worth experimenting with.
Frequently asked questions
How many coffee beans does it take to make a cup of coffee?
A standard espresso shot uses roughly 60 to 70 beans, depending on dose and grind. A filter cup takes fewer beans per serving but a larger overall weight, since filter coffee uses a coarser grind and more water per gram of coffee.
Do coffee beans go off?
Beans do not spoil in the way food does, but they lose aroma and flavour steadily after roasting. Most are best used within four to six weeks of the roast date and within two to three weeks once the bag is opened.
Can you use coffee beans in any machine?
No. Whole beans only work in bean-to-cup machines or with a separate grinder feeding an espresso machine. Filter machines need pre-ground coffee, and capsule machines take sealed capsules, not loose beans.
What is the difference between coffee beans and ground coffee?
Coffee beans are whole and need grinding just before brewing, which preserves aroma and flavour for longer. Ground coffee is pre-ground to a specific size for filter or cafetiere use, but it stales faster once the packet is opened.
Are darker roasted beans stronger in caffeine?
No. Roast level has little effect on caffeine content, and if anything caffeine drops slightly the longer beans are roasted. Strength of flavour and body increase with darker roasts, but that is not the same as caffeine strength.
Not sure which beans suit your setup? Tell us what machine you are running and how many cups a day it pulls, and we will point you at the right blend. Start by browsing our coffee beans range.
