Types of Coffee: A Complete Guide to Drinks, Beans & Roasts

Coffee is classified in four ways: by bean variety, by roast level, by brewing method and by finished drink. Get those four layers straight and almost every menu in the country makes sense. This guide works through each one, with the practical detail that matters if you are buying coffee for a business rather than a kitchen cupboard.

What Are the Main Types of Coffee?

Most confusion comes from mixing up the layers. A flat white is not a type of bean. Arabica is not a brewing method. Separate them and choosing coffee becomes a sequence of simple decisions rather than one big one.

• Bean variety: arabica, robusta or a blend. This sets the baseline flavour, the caffeine level and a good deal of the cost.
• Roast level: light, medium or dark, with decaf running alongside as a processing choice rather than a roast.
• Brewing method: espresso, filter, pour over, cold brew or instant. Each extracts differently and gives a different strength and texture.
• Finished drink: what the customer actually orders. Espresso plus milk in varying ratios covers most of a British café menu.

The four decisions interact. A dark-roast robusta blend brewed as espresso gives a heavy shot that cuts through milk; the same beans in a filter brewer taste harsh. For more on who roasts what, our buyer’s guide to coffee types, brands and brewing covers the supplier side.

Coffee Bean Varieties: Arabica, Robusta and Blends

Commercial coffee comes from two species, and the differences are stark enough to taste blind.

• Arabica: grown at altitude, slow to ripen, higher in sugars and aromatics. Sweeter and more acidic, with fruit, floral or chocolate notes depending on origin. Lower yielding and more expensive.
• Robusta: hardier, lower altitude, higher yield, lower cost. Roughly twice the caffeine, earthier and more bitter, with a thicker and more persistent crema.
• Blends: most commercial coffee sold in the UK. Blending holds a consistent profile across harvests, balances acidity against body and hits a workable price point.

Single-origin arabica is what speciality shops build their reputation on. Ethiopian lots lean citrus and jasmine, Colombian lots lean caramel and red fruit, Brazilian lots lean nut and chocolate. Good robusta, though, is not a compromise. Italian espresso blends have used it for decades because a cappuccino built on 100 per cent washed arabica can disappear under the milk, while a blend with 15 to 30 per cent robusta will not.

A typical house espresso blend pairs a Brazilian base for sweetness and body with a Central American component for brightness, plus a touch of robusta for crema. Our range of whole coffee beans runs from high-arabica speciality blends to robusta-forward espresso built for milk drinks.

Which to choose

• Mostly black coffee, origin-minded customers: go arabica-heavy and consider a rotating single origin.
• Flat whites and lattes all day: a blend with some robusta tastes stronger in the cup and costs less per kilo.
• Low volume site: buy in smaller packs so beans stay fresh rather than sitting open in a hopper for a fortnight.

Roast Levels and How They Change the Cup

Green coffee tastes of almost nothing. Roasting develops the sugars, drives off moisture and creates the aromatic compounds that make the drink worth having. How far the roaster takes that process changes the cup more than most people expect.

• Light: pulled shortly after first crack. Keeps origin character and acidity, but needs hotter water and a finer grind. Unforgiving in a busy café with a rushed barista.
• Medium: the commercial default. Sugars have caramelised but roast flavour has not taken over, so the coffee works black and under milk. The safe bet for a single-hopper bean-to-cup.
• Dark: taken to or past second crack. Less acidity and nuance, more body and bittersweet depth. Surface oils can clog burrs and chutes, so cleaning schedules matter more.
• Decaf: decaffeination happens to green beans before roasting. Swiss Water and CO2 methods preserve flavour best, and a decent decaf is worth the shelf space.

Brewing Methods: Espresso, Filter, Pour Over and Cold Brew

Brewing is extraction: water dissolving soluble compounds out of ground coffee. Change the grind, the temperature, the contact time or the pressure and you change the drink entirely, using exactly the same beans.

• Espresso: around nine bars of pressure pushes water at 90 to 94°C through a compacted puck. A double typically uses 18 to 20g and runs 25 to 30 seconds.
• Filter and bulk brew: gravity does the work, so the cup is cleaner and milder. Strength is a ratio question, usually around 60g of coffee per litre of water.
• Pour over: the most expressive method for a light single origin, and the most expensive in staff time at three to four minutes a cup.
• Cold brew: coarse grounds steeped cold for 12 to 24 hours, then filtered. Smooth and sweet, and not the same thing as iced coffee, which is hot-brewed coffee chilled.
• Instant: brewed coffee dried into soluble granules. Flatter in flavour, but it needs nothing more than a kettle and still earns its place back of house.

Espresso is the foundation of commercial coffee in the UK, whether pulled by a barista or produced automatically. The different categories of commercial machine each handle that extraction in their own way, with real consequences for staffing and throughput. For breakfast service, conferences and hotel buffets, a filter and bulk brewer puts out litres at a time without tying up anyone behind the counter, and the coffee holds up in an insulated airpot for an hour or so.

Espresso-Based Drinks Explained

Nearly every milk drink on a British café menu is espresso plus steamed milk in a different ratio, in a different cup. The names come from Italy, Spain, Australia and the United States. The ratios are what actually distinguish them.

• Cappuccino: roughly equal parts espresso, milk and foam. Aerate longer than you would for a flat white and finish the milk between 60 and 65°C.
• Latte: milk-forward and mild. Heavy dilution means a weak shot has nowhere to hide, so many sites now pull doubles as standard above 300ml.
• Flat white: a double with silky steamed milk and no thick foam layer. Texture is everything: wet paint, not bubble bath.
• Macchiato: espresso marked with a spoon of foam. Train staff to check, because latte macchiato is a different drink and is what many chain customers expect.
• Cortado: espresso cut with an equal volume of lightly steamed milk in a small glass. Ideal for anyone who finds a latte too milky.
• Americano: a double lengthened with hot water, usually one part coffee to two or three parts water. Fast to make and reliably profitable.

Two things decide whether these come out the same every time: the grinder and the barista. Dose and grind consistency matter more than the espresso machine itself, and our guide to grinder types and which suits your shop explains why burr geometry and dosing method make such a difference. Beyond that, good jugs, a decent tamper, a milk thermometer and a cleaning routine do more for cup quality than most upgrades. Our barista gear range covers the kit, and we run barista training from a £160.00 ex VAT foundation session up to a full course at £325.00 ex VAT.

Speciality and Dessert Coffees

After-dinner coffee is one of the easiest margin opportunities in hospitality. The ingredients are cheap, preparation takes a minute, and a well-made dessert coffee keeps a table seated and spending.

• Affogato: a scoop of proper vanilla gelato in a chilled glass with a fresh double poured over at the table. Serve immediately.
• Irish coffee: hot coffee, Irish whiskey, brown sugar and a float of lightly whipped cream, drunk through the cream. Our classic Irish coffee recipe covers the method and ratios.
• Mocha: espresso, chocolate and steamed milk. A reliable winter seller and a useful entry point for customers who do not really like coffee.
• Espresso martini: espresso, vodka and coffee liqueur, shaken hard. Needs a fresh shot, not one sitting in a jug.
• Café corretto: espresso corrected with grappa or brandy. Fast, traditional and sells well in Italian restaurants.
• Flavoured lattes: syrup variations that cost pennies and let you run seasonal specials without new equipment.

Choosing the Right Type of Coffee for Your Business

The right coffee is the one your equipment can brew well and your staff can make consistently at your busiest hour. Work backwards from volume and skill level rather than starting with the beans.

Independent cafés and coffee shops

With trained baristas and a traditional machine you have the widest choice. A medium-roast house blend for milk drinks plus a rotating single origin for black coffee covers most customers. Buy whole beans in quantities you will get through in two to three weeks, and dial in at least once a day. Grind retention and burr wear show up in the cup long before they show up on a service invoice.

Offices and workplaces

Nobody in an office wants to tamp. Whole beans in a bean-to-cup machine give the best balance of quality and simplicity, and a balanced medium roast suits the setting because one bean has to serve every drink. For smaller teams or secondary points of service, instant still makes sense: Douwe Egberts Pure Gold in a 300g tin costs £17.00 ex VAT and covers the meeting room without any machine at all.

Hotels and restaurants

Breakfast and dinner are two different problems. Bulk filter handles the morning rush, while evening service needs proper espresso, and the two rarely run off the same machine. Our range of commercial coffee machines spans single-group espresso up to high-output bean-to-cup systems, and the right answer depends on cups per hour at your peak rather than cups per day.

A quick sanity check before you order

• Match the format to the machine. Bean-to-cup takes whole beans, filter brewers take ground coffee, and capsule machines take their own sealed capsules. These are not interchangeable.
• Buy to turnover. Roasted coffee is at its best in the first month. Ordering three months of stock to save pennies per kilo costs you flavour.
• Account for water. Hard water scales machines and dulls flavour. Filtration is cheaper than a boiler replacement.
• Train the people using it. The gap between a good machine used badly and an average machine used well is wider than most operators expect.

Frequently asked questions

What is the difference between espresso and regular coffee?

Espresso is brewed by forcing hot water through finely ground coffee under high pressure, producing a small, concentrated shot with crema. Regular or filter coffee uses gravity and coarser grounds, giving a larger, milder cup. Espresso forms the base for lattes and cappuccinos; filter coffee is typically drunk black.

Which type of coffee has the most caffeine?

By volume, espresso has the highest caffeine concentration, but a full mug of filter coffee usually contains more caffeine overall because of its larger serving size. Robusta beans carry roughly twice the caffeine of arabica, so a robusta-heavy blend will be stronger cup for cup.

Is instant coffee a real type of coffee?

Yes. Instant coffee is brewed coffee that has been dried into granules or powder, then rehydrated with hot water. It is quicker and cheaper than other methods, though it generally has a flatter flavour than freshly ground filter or espresso coffee.

What type of coffee works best in a bean-to-cup machine?

Bean-to-cup machines need whole roasted beans, not ground coffee or capsules. Medium-roast arabica or arabica-robusta blends suit them well, giving a consistent, balanced result across cappuccinos, lattes and black coffee.

Not sure which coffee suits your setup? We have been supplying UK cafés, offices and hotels since 1993, and orders placed before 4:30pm Monday to Friday are dispatched the same day with free next working day delivery on orders over £69 ex VAT to mainland UK. Browse the full coffee range or call us to talk through what your machine and your volume actually need.