How to brew a £6 coffee pod so it tastes like a £6 coffee

A capsule machine will make you a cup of coffee at the touch of a button. That is its whole point, and we're not going to pretend otherwise. But there is a difference between a cup of coffee and the cup the coffee is capable of, and with a rare coffee the gap between the two is wide enough to be worth ten minutes of your attention.

Everything below applies to any coffee in a pod. It matters more when the pod holds Esmeralda Geisha.

At a glance. Six things, in order of how much they change the cup.

1. 25ml, not 40. Set the machine to a ristretto. Most of what goes wrong with pod coffee is water.
2. Run a blank shot first, into your cup. Hot machine, clean path — and a warm cup, which matters more than you'd think.
3. Soft water. Volvic if your tap water is hard, which in London it is.
4. Stir the shot. Espresso separates into layers within seconds; a spoon puts them back.
5. Drink it in the first minute. A 25ml shot is at 60°C within seconds of landing. Don't let it wait.
6. Milk in the chocolate ones, not the fruity ones. Kona and Blue Mountain, yes. Geisha, no.

Why 25ml

A Nespresso machine ships set to 40ml for the espresso button. We recommend 25ml — the ristretto setting on machines that have one, or a recalibrated espresso button on those that don't.

The reason is arithmetic, and we've weighed it. Our capsules hold 5.6 to 5.8 grams of coffee — the exact dose is set for each coffee, because roast, bean and grind meet differently every time, so there is no single number across the range. A 25ml shot doesn't deliver 25 grams to the cup: the grounds keep some of the water, as they always do, and on our scales — an Acaia Pyxis, accurate to a hundredth of a gram — the ristretto setting yields 20 to 22 grams of coffee. That is a brew ratio of about 1:3.7, the short, dense end of the espresso range, where sweetness and body sit in front of acidity. Push 40ml through the same dose and you are past 1:6, which is where astringency and thinness come in. A lungo at 110ml is a coffee that has been asked to give more than it has.

This is the answer to the question we get most, which is whether 5.7 grams is enough. Dose is one part of strength and brew volume is the other: 5.7 grams brewed to 25ml is a concentrated cup, and pushing more water through the same dose dilutes it while continuing to extract from the grounds. A traditional Italian single espresso is 7 grams; the 18 to 20 grams you see quoted for cafés is a double, and not everyone wants a café double. A pod treated as a single at the right ratio is a concentrated, intense cup; over a decade of tastings, with hundreds of people if not thousands, intensity of flavour is the thing we hear about most. What dose does not decide is complexity. The jasmine in a Geisha and the apple in a Kona are in the coffee, not in the grammage; a 5.7-gram dose of Esmeralda carries them because they are there to carry. For a longer drink, brew the 25ml, take the capsule out, and add hot water. Never press the button twice.

To recalibrate an espresso button: put a measuring cup under the spout, press and hold the button, and release it as the coffee reaches 25ml. The machine remembers the setting.

Run a blank shot first

Before the first coffee of the day, run a cup of water through the machine with no capsule in it, into the cup you're about to use. Three things happen. The machine and the group reach temperature — a cold machine underextracts the first shot and it tastes sour. Any coffee residue or oil left from the last capsule is flushed out instead of ending up in the Geisha. And the cup is warm, which turns out to be the step that matters most, for a reason we measured and explain below.

Thirty seconds, and it's the most-skipped step there is.

Water

Coffee is 98 per cent water, and the two per cent only tastes right if the 98 does. The best water for coffee is soft — low in minerals, no chlorine. Most of the south of England, London included, has hard tap water, and very hard or poorly balanced water mutes the acidity and the fruit — exactly the part of a Geisha or a Kona you paid for — as well as scaling the machine.

The Specialty Coffee Association's water standard puts the numbers on it: total dissolved solids between 75 and 250 mg/l with a target of 150, calcium hardness between 17 and 85 mg/l with a target of 68, and no chlorine at all. London tap water runs at around 300 mg/l of hardness — "very hard" on the Drinking Water Inspectorate's scale, and three to four times the top of the SCA's range. Volvic, which is what we use, has a hardness of about 60 mg/l and total dissolved solids of about 110: inside the standard on every measure, on the softer side of the target. That is why we name it rather than saying "bottled water"; most bottled waters are harder than London's tap. A charcoal filter jug helps; a reverse-osmosis system with minerals added back is the enthusiast's route. Softer, cleaner water is the single cheapest upgrade to a capsule machine there is.

Freshness: the question people ask about pods

The objection to pods is that the coffee is old. It's worth being exact about what happens to ours.

Roasted coffee needs to rest before it is brewed — it gives off carbon dioxide for days after roasting, and coffee brewed too soon is gassy and uneven. For espresso the usual rest is around three weeks; we rest for four. Then we grind, and seal each dose in its own capsule. Once sealed, the capsule greatly slows the two things that take flavour out of coffee: degassing and oxidation. Ground coffee in an open bag is stale within days; our sealed capsules carry a two-year shelf life.

So a properly sealed pod is not ground coffee that has been sitting exposed for months. It is rested coffee, ground once and stopped. That is a different thing from a bag of beans that has been open on the counter since Tuesday.

Stir the shot

Watch an espresso for ten seconds after it lands and it separates: the dense, sweet, acidic liquid at the bottom, a thinner layer above it, and the crema on top, which is bitter and holds most of the aroma. Sip it unstirred and you get the bitter top first and the sweetness last, or not at all. A stir puts the three back together, opens the aroma, and takes the temperature down a few degrees.

Drink it in the first minute

The mouth tastes differently at different temperatures, and at 80°C most of what you taste is heat. The coffee is ready to drink at about 60°C, and there is more behind that number than habit.

The Specialty Coffee Association's cupping protocol — the standard method for grading coffee — doesn't allow tasting until the coffee has cooled to about 70°C, and scores flavour, acidity, body and balance as it falls through the sixties, with sweetness and clean cup judged cooler still. Professionals don't taste hot coffee; they wait for it. Consumers, asked rather than trained, land in the same place: across three hundred subjects in a University of Texas study, the preferred drinking temperature was 60°C give or take eight, and black-coffee drinkers in the follow-up review preferred 61. The University of Copenhagen's study for the specialty trade found why: aromatic release climbs steeply above 40°C, intensity and roast character show between 50 and 62, and sweetness comes forward as the cup drops below 50. Sixty is where you have all of it at once.

The surprise is how quickly a capsule shot gets there. We measured it with a DiFluid Moment, a thermometer built for this: a 25ml shot lands in the cup at about 67°C — which, as it happens, is the temperature the Istituto Espresso Italiano's standard specifies for a certified Italian espresso in the cup, 67°C ± 3. In a cold cup it is at 60 within ten seconds. In a cup warmed by the blank shot, it takes about twenty-five. So the old advice to let coffee cool for a minute or two is wrong for a ristretto — by then it's at forty-something, and the aromatics that are released above 40 have gone. Warm the cup, and drink it in the first minute. The warm cup is not a nicety; it is the difference between fifteen seconds at the right temperature and forty.

A Geisha rewards the whole of that minute. The florals are at their most volatile early; the sweetness and the clarity that separate a 94-point coffee from a good one come through as it drops toward 50. The last sip is often the best one.

Milk

Any coffee takes milk. Not every coffee is improved by it. Milk adds sweetness, fat and body, and it works with coffees that already run in that direction: dark chocolate, cereal, nut. It works against coffees whose point is fruit and florals, because those are the notes it covers first.

So, across our range: Kona, Blue Mountain, the Yellow Bourbon and the Wild Kopi Luwak are good with milk — the chocolate comes forward and the acidity sits behind it. The Geishas and the Cup of Excellence lots can take milk, but shouldn't: they are coffees whose whole point is complexity, and milk is the first thing that covers it. A flat white made with Esmeralda Geisha is a flat white that has lost its jasmine and cost you £6. If you take milk, use full-fat — lower-fat milks give a thinner, flatter drink — or Oatly Barista if you'd rather not.

The machine

Less than people think. Nespresso Original machines use pumps rated at up to 19 bars, but that isn't the pressure the coffee sees. Nineteen is the pump's maximum; the pressure inside the capsule is dynamic, shaped by the capsule and the coffee bed. Nestlé's own instrumented tests, published in a patent application, measured ordinary aluminium capsules in a Nespresso Inissia opening at 6 to 8 bar a few seconds in, peaking at 9 to 15, and settling at 9 to 14 bar for the rest of the extraction — the espresso range, arrived at by the coffee resisting the pump rather than by the pump's rating. Nine bar, for context, is the traditional reference pressure for espresso: the Istituto Espresso Italiano's standard for certified Italian espresso specifies 9 bar ± 1, and La Marzocco's machines leave the factory set to nine.

Across Original machines, the differences that matter in practice are temperature behaviour, programmed volume, heat-up and convenience. A machine with a ristretto button saves you recalibrating. A machine with a steam wand — the Sage Creatista, for example — matters if you drink milk. Spending more on another Original machine will not transform the coffee.

What does matter is that it's clean. Descale it on the schedule the manufacturer gives, and run the blank shot every morning.

The cup

The vessel changes the experience more than people expect — and having measured how fast a shot cools, we'd now say it changes it more than we expected. A cup with a narrow rim concentrates aroma; a thick wall, warmed first, holds the shot at drinking temperature for two and a half times as long as a cold one; a wide, shallow cup loses both. We developed our own cup for the coffees we serve — it's the one in our photographs — and there are others on the market in the same spirit. What we'd avoid is a mug: it's the wrong volume for 25ml and the coffee is cold by the time it's halfway down.

Coffee by coffee

Panama Geisha (Esmeralda Nido, Elida Natural). 25ml, black, in a warmed cup, and drink it within the minute. The jasmine is in the first sip and the strawberry in the last; milk removes both. Coffee Review scored our Esmeralda capsule 94 points on five separate occasions, brewed at 25ml — the story of that coffee is here.

Hawaii Kona. 25ml. Black is best but milk is fine — it's a breakfast coffee. Don't lengthen it; the apple sweetness lives in a short cup. More on the estate here.

Jamaica Blue Mountain. 25ml. Black or with milk. The chocolate-and-nut profile is the most milk-friendly in the range.

Wild Kopi Luwak. 25ml. Works well with milk; try it black first.

Brazil Yellow Bourbon and the Swiss Water Decaf. 25ml. Both are chocolate-led Daterra coffees and both take milk well. The decaf is the same coffee with the caffeine removed, and it brews the same way — how Swiss Water works, here.

Cup of Excellence lots. 25ml, neat, and treat it like the Geisha. These are competition coffees judged on complexity and clarity, and that is what milk takes away.

Questions we get asked

Is a 5-gram pod enough coffee?

For a single espresso, yes. A pod holds 5.6 to 5.8 grams; a traditional Italian single is 7, and the 18 grams quoted for cafés is a double. Brewed at the 25ml setting a pod yields 20 to 22 grams in the cup — a ratio of about 1:3.7, ristretto strength. If you want a double, use two.

Why 25ml and not the machine's 40?

Because 40ml over-extracts a 5.7-gram dose: you get thinness and astringency instead of sweetness and body. Set the machine to ristretto or recalibrate the espresso button.

Are coffee pods stale?

Ours are rested for four weeks after roasting, then ground and sealed in the capsule. The seal greatly slows degassing and oxidation, which are what make coffee go stale. Sealed, they carry a two-year shelf life.

Should I let a capsule espresso cool before drinking?

No — it cools faster than you'd think. A 25ml shot lands at about 67°C and is at 60, the temperature most people prefer, within ten seconds in a cold cup or about twenty-five in a warmed one. Warm the cup and drink it in the first minute.

Can I make an Americano or a long black?

Yes: brew 25ml, remove the capsule, add hot water to taste. Don't press the button twice — the second press over-extracts the grounds and adds bitterness.

Does the machine matter?

Less than people think. Across Original machines, brew volume, temperature behaviour and cleanliness matter more than the headline pump rating. A ristretto button and a steam wand mainly add convenience.

Which coffees are best with milk?

Kona, Blue Mountain, Yellow Bourbon, Kopi Luwak and the decaf. The Geishas and the Cup of Excellence lots are best neat — they can take milk, but it covers the complexity you're paying for.

Do these work in a Nespresso Vertuo?

No. Nespresso Original machines only.