How To Make A Double Shot Of Coffee At Home

Quick answer

• Use an espresso machine designed for home use.
• Grind fresh, high-quality coffee beans to a fine consistency.
• Dose around 18-20 grams of coffee into your portafilter.
• Tamp the grounds evenly and firmly.
• Pull your shot, aiming for a yield of 36-40 grams in 25-30 seconds.
• Taste and adjust grind size or dose if needed.
• Keep your machine clean for consistent results.

Who this is for

• Anyone craving a strong, concentrated coffee experience at home.
• Home baristas looking to level up their espresso game.
• Those who want to make espresso-based drinks like lattes and cappuccinos without hitting the coffee shop.

If you’re craving a strong, concentrated coffee experience at home or want to elevate your espresso game, a quality home espresso machine is essential.

Nespresso Vertuo Pop+ Coffee and Espresso Maker by De'Longhi, Candy Pink

Buy on Amazon

What to check first

Brewer type and filter type

You’re likely using an espresso machine. These use pressurized water. Most home machines use a portafilter with a basket. The basket size dictates how much coffee you can dose. Some machines have pressurized baskets, which are more forgiving. Non-pressurized baskets offer more control but require a finer grind and better technique.

Water quality and temperature

Good coffee starts with good water. Tap water can have minerals that affect taste and scale up your machine. Filtered water is usually best. For espresso, water temperature is critical. It should be between 195°F and 205°F. Most decent machines handle this automatically. If yours is adjustable, check the manual.

Grind size and coffee freshness

This is HUGE. For a double shot, you want a fine, consistent grind. Think granulated sugar, maybe a bit finer. Freshness matters. Coffee loses its magic quickly after roasting. Aim for beans roasted within the last few weeks. Store them in an airtight container, away from light and heat. Don’t grind until you’re ready to brew.

Coffee-to-water ratio

This is often called the “brew ratio.” For a double shot, a common starting point is 1:2. That means if you use 18 grams of coffee, you aim for about 36 grams of liquid espresso. Some people go a bit longer, like 1:2.5 (18g coffee to 45g espresso). It’s all about taste.

Cleanliness/descale status

A dirty machine makes bad coffee. Period. Coffee oils build up, leading to bitter flavors. Regular backflushing (if your machine supports it) and wiping down the portafilter and shower screen are key. Descaling removes mineral buildup. If you notice slower flow or weird tastes, it’s probably time to descale. Check your machine’s manual for the recommended schedule.

Step-by-step (brew workflow)

1. Gather your gear.

• What to do: Get your espresso machine, portafilter, fresh coffee beans, grinder, scale, and a cup ready.
• What “good” looks like: Everything is clean and within easy reach.
• Common mistake: Forgetting a key item, like the scale, mid-process. Avoid this by doing a quick setup check.

2. Heat your machine.

• What to do: Turn on your espresso machine and let it heat up fully. This usually takes 15-30 minutes.
• What “good” looks like: The machine is fully heated, and the portafilter is warm.
• Common mistake: Trying to pull a shot on a cold machine. This leads to under-extraction and sour coffee. Give it time.

3. Grind your beans.

• What to do: Weigh out your whole beans (e.g., 18-20 grams) and grind them to a fine, consistent powder.
• What “good” looks like: The grounds look like fine sand or granulated sugar, with minimal clumping.
• Common mistake: Grinding too coarse or too fine. Too coarse means watery espresso; too fine means it won’t flow. Adjust your grinder.

4. Dose the portafilter.

• What to do: Place the ground coffee into your portafilter basket. Use your scale to ensure you have the correct dose.
• What “good” looks like: The coffee is evenly distributed in the basket, without excessive mess.
• Common mistake: Inconsistent dosing. This leads to uneven extraction. Use a scale every time.

5. Distribute the grounds.

• What to do: Gently level the coffee grounds in the portafilter. You can tap the side or use a distribution tool.
• What “good” looks like: The coffee bed is flat and even, with no major mounds or dips.
• Common mistake: Leaving high spots or tunnels. This causes channeling, where water finds easy paths.

6. Tamp the grounds.

• What to do: Apply firm, even pressure with your tamper to compress the coffee grounds into a solid puck.
• What “good” looks like: A smooth, level puck with no gaps. The pressure should feel consistent.
• Common mistake: Uneven tamping or insufficient pressure. This also leads to channeling. Aim for a level surface.

7. Clean the portafilter rim.

• What to do: Wipe away any stray coffee grounds from the rim of the portafilter.
• What “good” looks like: A clean rim.
• Common mistake: Leaving grounds on the rim. This can interfere with the seal on the group head, leading to leaks and poor extraction.

8. Flush the group head.

• What to do: Run a short burst of hot water through the group head before locking in the portafilter.
• What “good” looks like: Clear water runs out.
• Common mistake: Skipping this. It helps stabilize the temperature and cleans out old grounds.

9. Lock in and brew.

• What to do: Immediately lock the portafilter into the group head and start the brew cycle. Place your cup on the scale underneath.
• What “good” looks like: The brewing starts with a few drops, then a steady, syrupy stream.
• Common mistake: Waiting too long after tamping. The hot portafilter can cook the grounds, leading to bitter flavors.

10. Monitor the shot.

• What to do: Watch the flow and the time on your scale. Aim for your target yield (e.g., 36-40g) within 25-30 seconds.
• What “good” looks like: A beautiful, tiger-striped stream that gradually lightens.
• Common mistake: Letting the shot run too long or stopping it too soon. This results in either over-extracted (bitter) or under-extracted (sour) coffee.

11. Stop the brew.

• What to do: Stop the brew cycle once you reach your target yield.
• What “good” looks like: You’ve hit your weight target within the desired time frame.
• Common mistake: Guessing the yield. Use a scale for accuracy.

12. Taste and adjust.

• What to do: Taste your espresso. Is it balanced? Too sour? Too bitter? Adjust your grind size for the next shot.
• What “good” looks like: A delicious, balanced shot.
• Common mistake: Not tasting or not adjusting. This means you’ll keep making the same less-than-ideal coffee.

Common mistakes (and what happens if you ignore them)

Decision rules (simple if/then)

• If your espresso tastes sour, then grind finer because sourness indicates under-extraction.
• If your espresso tastes bitter, then grind coarser because bitterness indicates over-extraction.
• If the espresso flows too fast (under 20 seconds for a double shot), then grind finer because a faster flow means the coffee bed is too porous.
• If the espresso flows too slow or drips (over 35 seconds for a double shot), then grind coarser because a slow flow means the coffee bed is too compacted or the grind is too fine.
• If your espresso has weak crema, then check your coffee freshness and grind size because stale beans or a grind that’s too coarse won’t produce good crema.
• If you see spurts of water from the side of the portafilter, then check your tamping and distribution because this is a sign of channeling.
• If your machine is making weird noises or the flow is weak, then it’s likely time to descale because mineral buildup is restricting water flow.
• If your espresso tastes like burnt plastic, then clean your machine thoroughly because coffee oils can go rancid.
• If your espresso yield is inconsistent, then use a scale to measure both your coffee dose and your output liquid because consistency is key.
• If your espresso shots are unbalanced, then try adjusting your coffee-to-water ratio slightly, either slightly more water (longer shot) or slightly less (shorter shot), because this can balance acidity or bitterness.
• If your espresso tastes metallic, then check your water quality because some water sources can impart metallic flavors.

FAQ

What’s the difference between a single and a double shot of espresso?

A double shot uses more coffee grounds and yields more liquid espresso. Typically, a double uses 18-20 grams of coffee and produces 36-40 grams of liquid espresso, while a single uses less coffee and produces less liquid.

How do I know if my grind size is right?

The ideal grind for espresso is fine, like granulated sugar. If your shot runs too fast and tastes sour, it’s too coarse. If it runs too slow and tastes bitter, it’s too fine.

Can I use pre-ground coffee for espresso?

It’s not ideal. Pre-ground coffee loses its freshness and aroma quickly. For the best espresso, grind your beans right before brewing. If you must use pre-ground, look for espresso-specific grinds and use them immediately.

What does “channeling” mean in espresso brewing?

Channeling happens when water finds pathways through the coffee puck instead of flowing evenly. This leads to uneven extraction, resulting in a mix of sour and bitter flavors. It’s often caused by poor distribution or tamping.

How much crema should I expect?

A good double shot should have a nice layer of reddish-brown crema on top. It indicates fresh beans and proper extraction. If you have very little or no crema, your beans might be too old, or your grind is off.

My espresso tastes weak. What should I do?

A weak-tasting espresso is usually under-extracted. Try grinding finer, ensuring you have the correct coffee-to-water ratio, and making sure your machine is at the right temperature.

How often should I clean my espresso machine?

Daily cleaning of the portafilter and shower screen is essential. Backflushing with water should be done after every few uses or daily if you make many shots. Descaling depends on your water hardness and machine manufacturer’s recommendations, typically every 1-3 months.

What’s the best way to store coffee beans?

Store whole beans in an airtight, opaque container at room temperature. Avoid the refrigerator or freezer, as this can introduce moisture and off-flavors.

What this page does NOT cover (and where to go next)

• Specific machine maintenance and repair guides (check your manufacturer’s manual).
• Advanced latte art techniques (that’s a whole other beast!).
• Dialing in specific bean origins or roast levels for unique flavor profiles (explore coffee blogs and forums).
• Commercial-grade espresso machine operation.
• Water filtration system comparisons.