Most espresso advice is written for doubles: 18 grams in, 36 grams out, done. But plenty of people want a single, whether for a small cappuccino, a second coffee in the afternoon, or simply because that is how espresso is drunk in Italy. The trouble is that the single basket that came with your machine is the hardest basket to get right. This guide is only about singles: the four ways to make one, a starting recipe for each, which basket and tamper actually help, and how to fix the shots that go wrong.
First, Decide What Kind of Single You Want
"Single shot" sounds like one thing, but at home it can be made in four physically different ways. They need different grind settings, different tools and different amounts of patience. Pick the method before you touch the grinder.
| Method | Dose | Difficulty | Best for |
|---|---|---|---|
| Split shot | Your normal double, into two cups | Easy | Two people, or the exact taste of your double in half the volume |
| Stock tapered single basket | 7 to 10 g | Hard | Using the basket you already own |
| Precision single basket | 7 g ± 1 (some models up to 10 g) | Moderate | Regular singles with real control and repeatability |
| Small double | 12 to 14 g in a small precision basket | Easy | Less coffee without the single-basket problems |
If you only want a smaller drink or less caffeine, the split shot and the small double are the honest shortcuts. If you want a true single-basket shot, read on: it is very doable, it just needs a different approach from a double. For the background on why singles and doubles differ at all, see single vs double espresso.
Starting Recipes for Every Method
These are starting points, not targets. Use a scale that reads to 0.1 g, pull the shot, taste it, and adjust from there.
| Method | In | Out | Time | Grind vs your double |
|---|---|---|---|---|
| Split shot | 18 g | 36 g total, about 18 g per cup | 25 to 30 s | Same |
| Stock tapered single | 8 to 9 g | 16 to 18 g | 25 to 30 s | Usually finer |
| Precision single (7 g) | 7 g | 14 to 16 g | 25 to 30 s | About the same as a matching precision double |
| Small double (14 g basket) | 13 to 14 g | 26 to 28 g | 25 to 30 s | Same or slightly finer |
The ratio column is the classic 1:2. Italian bars traditionally run a little longer, closer to 1:2.5 or 1:3 by weight, and light roasts often taste better longer too. Darker blends usually prefer 1:1.5 to 1:2. The brew ratio guide explains how each change moves the taste.
Method 1: The Split Shot
This is how Italian bars have made singles for decades. Pull your normal double through a two-spout portafilter and put a cup under each spout. Each cup gets half of the same extraction, so it tastes exactly like your double, only smaller.
- Nothing to re-dial. Your grinder setting, dose and shot time stay exactly where they are.
- Use two cups on the scale, or check that both cups end up with roughly the same weight. Spouts rarely split perfectly, especially if the machine is not level.
- It needs spouts. A bottomless (naked) portafilter cannot split a shot. If that is all you have, see the other three methods.
- The second cup is the catch. If nobody else wants it, it is wasted coffee, or a cold espresso for later in an iced drink or a dessert.
Method 2: The Stock Tapered Single Basket
Most machines ship with a single basket that looks like a funnel: wide at the top, narrowing sharply towards a small floor. It holds a small dose at a reasonable depth, but the puck ends up deep in the middle and thin at the edges, so water rushes down the sides. That is why a single from this basket can taste sour and bitter at the same time.
You can still pull good shots from it. The recipe is the same as for any espresso, but the margins are much smaller, so work in this order:
- Read the dose stamped on the basket. If there is none, fill it level without tamping and weigh that. Most stock singles want 7 to 10 g.
- Weigh every dose to 0.1 g. A 0.3 g error is about 4% of an 8 g dose. That is enough to change the shot time noticeably.
- Grind a few steps finer than your double. The small, funnel-shaped puck offers less resistance, so with your double setting the shot will usually gush.
- Distribute with a needle tool (WDT). Clumps have nowhere to hide in a small dose. Stir gently all the way to the bottom, especially around the edges.
- Tamp level, then stop. Pressing harder does not fix a single. A tilted tamp on a tapered puck guarantees side channelling.
- Pull 8 g to 16 g in 25 to 30 seconds, then change one variable at a time.
- Judge a setting over two or three shots. Singles vary more from shot to shot, so one bad shot does not prove the setting is wrong.
Method 3: A Precision Single Basket
The real fix for the funnel problem is a basket that makes the puck narrower instead of shallower. Precision single baskets keep the standard 58 mm rim, so they fit your portafilter, but drop into a narrow cylinder with straight walls about 41 mm across. The coffee sits only in that inner cylinder, which behaves like a miniature double basket: even depth, straight sides, no funnel.
Two things change compared with a stock single:
- You need a second, smaller tamper. Your 58 mm tamper rests on the ledge and never touches the coffee. A 41 mm tamper fits the inner cylinder. Some tampers are double-ended, with a large and a small face.
- The grind can stay close to your double. VST designs its baskets so that the 7 g, 15 g and 18 g sizes extract alike at their rated doses, which means you can switch between a morning double and an afternoon single without starting the grinder from scratch. In practice, expect small adjustments, but not the big jump a tapered basket needs.
IMS also makes precision baskets in single sizes, coded 1T (one cup). Whatever brand you buy, check two numbers before ordering: that the rim matches your portafilter (58 mm baskets do not fit 51 or 54 mm machines) and the dose range stamped on the basket.
Method 4: The Small Double
If what you really want is less coffee rather than a classic 7 g single, the easiest route is a smaller standard basket. A 14 g or 15 g precision basket with 13 to 14 g in it behaves much like the 18 g double you already know: straight walls, an even puck and a forgiving shot. Pull it to about 26 to 28 g and you have roughly three quarters of a modern double with almost none of the single-basket headaches.
What about simply putting less coffee into your 18 g basket? Within about a gram or two of the basket's rating, that works fine. Go further and you get a shallow puck with a lot of empty space above it. The puck turns soupy, flow speeds up, and you end up grinding much finer to compensate, which changes the taste. Experienced home baristas report that around 10 g in a 14 g basket can get close to a dedicated single, at the cost of a wetter puck. A 9 g dose in an 18 g basket is not a good plan.
Finer or Coarser? It Depends on the Basket
The usual advice is that singles need a finer grind. That is true for the stock tapered basket, but it is not a law of nature, and one well-documented experiment shows the opposite can happen.
The rule behind both cases is the same: puck depth sets the resistance. A small dose spread thinly needs a finer grind; a basket packed fuller than its rating needs a coarser one; a basket filled to its rated dose needs roughly the grind its designer intended. So when you change baskets, do not assume a direction. Pull one shot at your double setting, look at the time, and move from there.
The experiment has a second lesson. Shortening the ratio raised the strength from 4.8% to 5.5% even though extraction did not improve, and the shot tasted better for it. If a single tastes thin and watery but not sour, try a shorter ratio before you reach for a finer grind.
Puck Prep That Matters More for Singles
Every prep step that helps a double helps a single more, because a small puck has less margin for error.
- Clean the basket and dry it before dosing. A few drops of water left in a small basket wet a large share of the puck.
- Watch grinder retention. If your grinder holds back 0.3 g and releases it into the next dose, that is a 4% swing on a 7 g single but under 2% on an 18 g double. Purge a little or weigh the output, not the beans.
- Use a dosing funnel sized for the basket. Singles are easy to spill, and lost grounds change the dose.
- Preheat the portafilter. A small puck in a big, cold portafilter loses temperature fast. Leave it locked in the group between shots.
- A puck screen can help on top of the coffee. Single baskets often leave a lot of headspace, and a screen spreads the water more evenly over the small surface. It adds a little resistance, so you may need to grind slightly coarser.
- Some home baristas add a paper filter cut to size under the coffee. It usually speeds the shot up and can reduce channelling, so expect to grind finer to compensate.
How a Good Single Tastes
Do not judge a single against a double. Even when it is dialled in well, a single basket shot tends to have lighter body, a little more brightness and less crema. That is normal, and many people prefer that clarity with light-roasted coffee. What you are looking for is balance: sweetness, a clean finish, no sharp sourness and no drying bitterness.
Taste it straight at least once, even if it will go into milk. A single gets lost much faster than a double in a big drink, so it works best in small ones: an espresso, a macchiato, a cortado or a traditional 150 ml cappuccino. In a 350 ml latte, a single is mostly warm milk.
Fixing a Bad Single
The basic rules are the same as for any espresso: sour means under-extracted, bitter and dry means over-extracted. Singles add a few problems of their own.
| What you see or taste | Likely cause | What to change |
|---|---|---|
| Shot gushes in 10 to 15 seconds | Grind too coarse for this basket, or dose too low | Check the dose against the basket rating, then grind finer |
| Sour and bitter at the same time | Water channelling down the edges of a tapered puck | Better WDT around the edges, level tamp, or a precision basket |
| Watery, soupy puck after the shot | Too much headspace: dose too small for the basket | Use a smaller basket or dose closer to its rating |
| Puck marked by the shower screen, shot chokes | Basket overfilled | Reduce the dose or grind coarser |
| Thin and weak, but not sour | Ratio too long for a small dose | Shorten the ratio before grinding finer |
| Every shot different | Dosing or retention errors magnified by the small dose | Weigh to 0.1 g, purge the grinder, judge over 2 to 3 shots |
| Fine with the old basket, terrible with the new one | Different basket geometry | Re-dial from scratch; do not assume finer or coarser |
For the full taste-based diagnosis, see the sour and bitter troubleshooting guide, and for the method of changing one variable at a time, how to dial in espresso.
Which Single Should You Choose?
| Your goal | Best method |
|---|---|
| The same taste as your double, in half the volume | Split shot |
| Less caffeine, no extra effort | Split shot, or a decaf or half-caff blend in your usual double |
| A smaller milk drink | Small double (13 to 14 g) |
| A real Italian-style single every day | Precision 7 g basket and a 41 mm tamper |
| Singles once in a while, no new gear | Stock tapered basket, dialled in carefully |
| You use a bottomless portafilter | Precision single or small double; a split is not possible |
Frequently Asked Questions
How many grams of coffee are in a single shot of espresso?
Between 7 and 10 g of ground coffee. The Italian standard is 7 g, most stock single baskets want 7 to 10 g, and precision single baskets are usually designed for 7 g plus or minus a gram. Always check the dose stamped on your basket and weigh to 0.1 g.
How much espresso should a single shot yield?
At the classic 1:2 ratio, about 14 to 20 g of liquid espresso, depending on the dose. An 8 g single pulled to 16 g is a good starting point. Italian bars often pull a little longer, around 1:2.5 to 1:3, and darker roasts often taste better shorter.
How long should a single shot take?
About 25 to 30 seconds, the same as a double. If a single runs much faster, the grind is usually too coarse for the basket or the dose is too low. Time is a guide, though: taste matters more than hitting an exact number.
Should I grind finer for a single shot?
Usually yes with a stock tapered single basket, because the small, funnel-shaped puck offers less resistance. With a precision single basket filled to its rated dose, the grind can stay close to your double setting. If you overfill a single basket, you may even need to grind coarser. Start from your double setting and adjust by taste and time.
Do I need a different tamper for a single basket?
For a stock tapered single, your normal tamper works. For a stepped precision single basket, such as the VST 7 g or the La Marzocco 7 g, you need a small tamper of about 41 mm, because a 58 mm tamper rests on the ledge and cannot reach the coffee.
Can I make a single shot with a double basket?
Yes, in two ways. You can pull a normal double through a two-spout portafilter and split it into two cups, which gives you a true single with no re-dialling. Or you can dose a little less than the basket's rating, but only by a gram or two. Much less coffee than that leaves a soupy puck and an uneven shot.
Why does my single shot taste sour and bitter at the same time?
That combination usually means channelling: water is running down the thin edges of the puck while the middle under-extracts. It is very common with tapered single baskets. Distribute carefully with a needle tool, tamp level, and if it keeps happening, switch to a precision single basket or a small double.
Where to Go Next
A good single is not a smaller double. It is its own recipe, with its own basket, its own grind and its own margins. Pick the method that fits why you want a single, weigh everything, and give the first bag a few extra shots to learn it.
Related reads: single vs double espresso for the history and the caffeine numbers, the grind size guide for the setting you will be moving most, and the full step-by-step espresso workflow for everything around the shot.