Great espresso comes down to three variables you can measure and repeat: dose (how much dry coffee goes in), yield (how much liquid espresso comes out), and time. Clive Coffee's baseline recipe is 20g in, 30g out (a 1:1.5 ratio) in about 30 seconds, with a good shot almost always landing between 25 and 35 seconds. Weigh everything with a scale, since crema makes volume unreliable, and start your timer at the first drop. The tool that ties it together is your grinder: grind finer to add resistance and slow the shot down, coarser to speed it up. Pull a shot, weigh the yield, and adjust the grind until you hit your target yield in your target time. That process is called dialing in, and it's the most important skill in espresso. Keep your tamp level and consistent, then taste and adjust for the cup.
Espresso has an erroneous reputation for being too fussy. Some say that it's a narrow-margin pursuit reserved for coffee obsessives with expensive gear and years of experience. We'd like to respectfully disagree. Yes, espresso is more involved than drip coffee; however, once you understand the three variables that define every single shot, you'll realize there's a clear, repeatable process anyone can follow.
The three parts of an espresso recipe are dose, yield, and time. Get these right, or close to it, and you'll begin to pull shots worth drinking. Keep reading, and we'll walk you through exactly what each one means, how they interact, and how to dial things in when they go sideways.
Before we get into the recipe: beyond your espresso machine and tamper, there are two tools you genuinely cannot do without — a quality grinder and a precise scale. You'll see why in a moment.
Dose: How Much Coffee Goes In
Dose is simply the weight of dry ground coffee you're putting into your portafilter basket, ideally measured in grams with a coffee scale. It's the starting point for everything else, and your basket size determines it.
As a rule of thumb, single baskets take 7–10g, double baskets take 16–18g, and triple baskets take 20–22g. Some baskets even have the target dose stamped right on the side. Underfilling your basket leads to uneven extraction and a weak, disappointing shot, so choose your basket with your target dose already in mind.
For this guide, we're working with a 20g basket, so our dose is 20g.
Yield: How Much Espresso Comes Out
Yield is the weight of liquid espresso you extract, measured in grams. Notice we said weight, not volume. That's because espresso is topped with crema, which makes volume measurements unreliable. Your scale is the only accurate way to know what you've actually pulled.
Ratio: The Relationship Between In and Out
Yield on its own doesn't mean much without context. That's where your espresso ratio comes in: the relationship between your dose (in) and your yield (out), expressed by weight.
Most espresso recipes fall somewhere between 1:1 and 1:3. Some modern, lighter-roast-forward recipes push to 1:5. For a solid, all-around starting point, we recommend a 1:1.5 ratio. It strikes a balance between strength and drinkability that works well across a wide range of coffees.
With our 20g dose, that means we're targeting a 30g yield (20g × 1.5 = 30g). That's the number we'll go for.
Time: The Variable That Ties It All Together
Time is where everything converges. Start your timer the moment the first drop of water hits the coffee grounds; that's when extraction begins, whether you're pulling a lever or pressing a button.
The longer your shot runs, the more compounds are extracted from the coffee. Salty and sour flavors come first, followed by sweetness and, finally, bitterness. A well-timed shot pulls the right balance of all three. 30 seconds is a reliable starting point for most coffees, with a good shot almost always falling somewhere between 25 and 35 seconds.
One useful rule of thumb: darker roasts often taste better with a slightly shorter shot time, while lighter roasts tend to benefit from a longer pull. But 30 seconds is always a safe place to start.
Your Grinder: The Key to Dialing in
Here's the piece that makes everything click into place: the flow rate of your shot is controlled by how finely or coarsely your coffee is ground. Finer grind settings create more resistance and slow the shot down. Coarse grinds create less resistance and let water pass through faster.
Think of it like water through river rocks versus water through sand. Coffee works the same way.
So what does that mean in practice? Stop your shot at 30 seconds. Weigh your yield. If it's over your target (30g in our case), grind slightly finer to slow things down. If it's under, adjust to a coarser setting to speed things up. Make small adjustments, pull another shot, and check again.
The process of adjusting your grind to hit your target yield in your target time is called dialing in. It's the most important skill in espresso, and it's the one that separates consistently good shots from inconsistent ones.
Tamping: Keep It Level and Consistent
Tamping gets more mystique than it deserves. There are really only two things that matter: tamping level and tamping consistently.
Grip your tamper like a doorknob, not a fist, and not a pinch. Apply even, downward pressure until the coffee puck is firmly compressed. The goal isn't a specific amount of force; it's that every tamp you make looks and feels the same.
There's no shortage of puck prep tools available today: WDT tools, puck screens, calibrated tampers, distribution tools, and more. In our experience, all of them can improve your consistency. But espresso was pulled without any of them for decades, and great shots don't require the full toolkit.
If you want two beginner-friendly upgrades that make a real difference, a puck screen (which promotes even water distribution into the puck) and a calibrated tamper (which guarantees a level, consistent tamp every single time). Start there.
Putting It All Together
Here's Clive Coffee's recipe:
Dose: 20g
Yield: 30g (1:1.5 ratio)
Time: ~30 seconds
Use this recipe as your baseline. Weigh your dose. Weigh your yield. Time your shot. Adjust your grind until your yield and time match your targets. Pull it again. Taste it.
Once you've got consistent shots using these fundamentals, the natural next step is learning to dial in the flavor of your espresso, adjusting not just to the numbers but to what's in the cup.