How to Pull a Good Espresso Shot: The 2026 Guide

Good espresso is not about expensive machines or barista tricks. It's four variables – dose, grind, tamp, time – and the discipline to change one at a time. This guide walks you through each one, and gives you the fixes for the two problems beginners actually hit: sour shots and bitter shots.

The Four Variables

1. Dose: start with 18g

Most home portafilters are sized for 18g of coffee (double shot). Weigh it – don't scoop. Consistency starts with the same dose every time. If your basket says 16–18g, use 18g and adjust from there.

2. Grind: finer than you think

Grind size controls extraction speed. The right grind is fine enough that a shot takes 25–30 seconds to yield about 36g (double the dose). If it runs through in 15 seconds, grind finer. If it drips for 45 seconds, grind coarser. A good burr grinder is essential – see our burr grinder guide.

3. Tamp: level and firm

Tamp flat and firm – about 15–20 kg of pressure. The point is a level, compact puck so water passes evenly. Uneven tamps cause channeling: water finds the weak spot, over-extracts it, and the rest stays sour.

4. Time: 25–30 seconds

Start your timer when the pump starts. A good shot yields ~36g in 25–30 seconds, with a slow, honey-like flow that turns golden at the end. Under 20 seconds = under-extracted (sour). Over 35 = over-extracted (bitter).

The Golden Ratio

Fix #1: Your Shot Is Sour

Sour = under-extraction. The water didn't pull enough flavor out. Fixes, in order: grind finer (biggest lever), use a fresher roast, increase your dose slightly, or use hotter water if your machine allows. Change one thing, pull again, taste again.

Fix #2: Your Shot Is Bitter

Bitter = over-extraction. Fixes, in order: grind coarser, reduce your dose slightly, lower the water temperature, or stop the shot earlier. Again: one change at a time.

The Beginner's Checklist

1. Fresh beans, roasted within the last 2–4 weeks – the single biggest taste factor
2. A burr grinder, dialed to the right fineness
3. Weigh 18g in, aim for 36g out
4. Tamp level and firm, every time
5. Time the shot: 25–30 seconds
6. Change one variable at a time until it tastes right

Written by Marco Bianchi

Marco Bianchi is a long-time home barista and coffee gear researcher. She has spent years comparing coffee gear – from espresso machines to coffee grinders – and writes hands-on, data-driven buying guides for LimeCrema.