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To make espresso at home, grind coffee finely, weigh a dose that fits your basket, distribute it evenly and tamp level. Brew into a cup on a scale, then adjust the recipe according to taste. For a suitable double basket, 18g of ground coffee producing 36g of espresso is a useful first attempt. It is a starting point, not a definition of good espresso.^[1]

The real breakthrough is learning to make a repeatable drink. Once you know what went into the basket and what came out, a disappointing shot becomes something you can improve instead of a mystery. You do not need to master every setting on the first morning.

What makes espresso different

Espresso is a brewing method: hot water passes under pressure through a compact bed of finely ground coffee. It produces a small, concentrated drink. An espresso roast is a roaster's suggested use, rather than a separate species of coffee bean. Different origins, blends and roast levels can all be brewed as espresso.^[2]

That distinction matters when buying beans. Choose flavours you actually enjoy, rather than assuming darker always means better. If you want a familiar chocolate-led drink with milk, a blend described that way is a sensible starting choice. If you enjoy fruitier coffee, experiment once your routine feels comfortable.

A moka pot or cafetière can make delicious strong coffee, but neither reproduces a conventional espresso machine's brewing process. Use them for their own recipes rather than trying to force an espresso recipe into different equipment.

The equipment that earns its place

For a conventional machine with a non-pressurised basket, assemble an espresso-capable grinder, an appropriately sized tamper, a small scale and a timer. An integrated grinder can fulfil the grinding role. A scale reading to 0.1g is useful for comparing doses and beverage weights, provided it fits securely beneath the cup.^[3]

Espresso requires much finer adjustment than simply choosing between coarse and fine coffee. Look for a grinder with enough control around the espresso range. A number on someone else's grinder is not a transferable recipe: models, calibration and coffees differ. Our coffee grinder buying guide explains the features to compare before choosing one.

Check which basket you have. A single-wall basket relies mainly on the coffee bed to resist water flow. It suits freshly ground coffee that you can adjust. A dual-wall or pressurised basket adds a restriction at the outlet and can be a practical choice for suitable pre-ground coffee. Sage supplies both types with several machines and gives different guidance for their use.^[4]

Pressurised baskets are not a failure to make proper coffee. They solve a different problem. Use the manufacturer's dose and grind guidance; do not assume every timing target for a single-wall basket applies unchanged.

A first espresso recipe

Use this recipe with a basket whose recommended capacity includes 18g. If yours is designed for 14g or 16g, use its appropriate dose and begin with roughly twice that weight in the cup.

Variable	First attempt
Ground coffee dose	18g in a suitable double basket
Espresso beverage yield	36g in the cup
Brew ratio	1 part dry coffee to 2 parts liquid espresso by weight
Time	Roughly 25–35 seconds as an initial observation
Temperature	Start with the machine's normal espresso setting
Adjustment	Keep dose and yield steady while finding the grind range

 

The yield means the finished beverage, not the water placed in the tank or pumped into the coffee. Some water remains in the used grounds. This is why an espresso ratio cannot be compared directly with a filter recipe expressed as coffee to water poured.^[5]

Time the same way on every attempt. Starting the timer when brewing begins is convenient, but note whether your machine includes a long pre-infusion. Different timing conventions can make two otherwise similar recipes look inconsistent. A shot that tastes balanced does not need fixing simply because its time falls outside the starting range.^[6]

Prepare the machine and coffee

Bring the machine to its recommended operating condition with the portafilter in place where the manual advises. Warm the cup, then empty it. A ready light and a fully warmed brewing system are not necessarily the same thing on every model, so follow the machine's own warm-up guidance.

Remove the portafilter and start with a clean, dry basket. Grind the coffee, weigh the actual dose and spread it evenly before tamping. Aim for a level surface rather than a mound on one side. Tamp straight and consistently, then brush loose grounds from the rim so the portafilter can seal properly.^[7][8]

Do not make tamping strength another daily adjustment. If a shot runs badly, first check dose, grind and distribution. Adding a complicated collection of tools before you can repeat those basics makes it harder to know which action helped.

Place the cup on the scale and zero it. Lock in the portafilter, start brewing and watch the beverage weight. Stop around the intended yield, allowing for any drips that continue after the pump stops. Record the actual yield, time and a few words about taste.^[9]

Dial in with one change at a time

Dialling in means adjusting the recipe until the coffee tastes right. Keep the beans, dose, yield and preparation steady while changing one variable. This gives each attempt a clear purpose.^[10]

Suppose your first shot uses 18g, reaches 36g in 17 seconds and tastes thin and sharply sour. Your next experiment is a slightly finer grind, keeping the 18g dose and 36g target. If it now tastes sweeter, the change was useful. If the machine struggles to produce any liquid, you went too far; move a little coarser.

Now imagine a different result: 18g produces 36g in 30 seconds, with pleasant texture but an acidity you find too sharp. Keep the grind steady and try 40g in the cup. That changes the ratio from 1:2 to about 1:2.2. Taste the result rather than assuming the larger number is automatically an improvement.

These are illustrative experiments, not measured results. Your coffee may behave differently. The point is to separate two decisions: finding workable flow, then finding the flavour and concentration you prefer.

If your grinder retains grounds, the first coffee after an adjustment can contain some from the previous setting. Follow its instructions on adjustment and purging. Do not transfer a manufacturer's advice to adjust while running to every grinder design.^[11]

Why finer is not always better

A finer grind generally increases resistance in the coffee bed, but the relationship has limits. Research combining espresso experiments with mathematical modelling found that very fine settings could reduce extraction and reproducibility, consistent with uneven flow through the grounds.^[12]

Think of water finding easier paths rather than travelling equally through the whole puck. This is called channelling. Grinding finer and finer cannot reliably rescue an unevenly prepared or partially blocked bed. A stalled shot that suddenly gushes, or results that vary wildly despite the same recipe, deserves a preparation check before another large adjustment.

A bottomless portafilter can reveal visible spraying, but it is optional. You can still make sensible decisions with an ordinary spouted portafilter, a scale and your palate.

Troubleshoot the drink in front of you

Fast and thin: confirm the dose first, then try a modestly finer grind. If results vary, check whether your grounds are distributed and tamped consistently.

Slow with only a few drops: stop the shot rather than waiting indefinitely. Check the basket is not overfilled and try a coarser grind. Follow the machine's instructions before removing a pressurised portafilter.

Overwhelmingly sour: once flow is sensible, try a little more beverage yield. A slightly finer grind is another experiment, but change it separately. Counter Culture's espresso guide similarly treats grind and brew ratio as tools for correcting an excessively sour cup.^[13]

Harsh or bitter: check cleaning and consider a slightly shorter yield. If flow is exceptionally slow, try a coarser grind. A dark roast's underlying flavour will not disappear through adjustment alone.^[14]

The numbers look right but the coffee tastes wrong: trust the drink. Note whether the problem is unpleasant sharpness, drying bitterness or simply more intensity than you enjoy. Those observations are more useful than writing only “bad”.

Water and cleaning belong in the recipe

Use fresh drinking water compatible with your machine's specifications. Hardness and mineral balance affect equipment as well as flavour. A filter that improves odour does not necessarily solve a scale problem, and plain distilled water is not automatically suitable. La Marzocco recommends checking local water against its specifications rather than choosing water by taste alone.^[15]

For a UK home setup, begin with your supplier's hardness information and the machine's water guidance. Ask the manufacturer what treatment is appropriate if the two do not match. Replace filters and perform cleaning or descaling only as directed for that model.

Empty and rinse the basket, keep the shower screen and portafilter clean, and follow the prescribed cleaning programme. Changing grind settings cannot compensate indefinitely for stale coffee residue in the brewing path.

Frequently asked questions

How much coffee should I use for a double espresso?

Use the basket's recommended capacity. The 18g example is common, but double baskets are not all identical. Keep your chosen dose stable while adjusting the recipe.

Is 30 seconds the perfect espresso time?

No. Time is a diagnostic clue alongside dose, yield and taste. Pre-infusion, coffee and equipment can all change what a useful time looks like.

Can I use pre-ground coffee?

Yes, particularly with a compatible pressurised basket. The limitation is that you cannot adjust its grind as the coffee or brewing conditions change.

Should every espresso use a 1 to 2 ratio?

No. Compare slightly shorter and longer yields after finding a workable grind. Write down the recipe you enjoy so you can return to it.

What should I upgrade first?

Identify the obstacle. If doses and yields vary, start with weighing. If one grinder setting gushes and the next chokes, finer control may help. If preparation changes each time, a steadier routine is the first improvement.