How to make a good home espresso?

A solid home espresso follows a simple recipe: 18 g of freshly ground coffee, 36 g in the cup (1:2 ratio), 25 to 30 seconds of extraction at 92-94 °C under 9 bars. The two non-negotiables are bean freshness (ideally 10 to 30 days post-roast) and grind consistency — a capable burr grinder matters more than an expensive machine.

The default third-wave recipe is a double shot at 1:2 ratio: 18 g in the basket, 36 g in the cup, in 25-30 seconds. That is a starting point to dial in against the bean, roast level and machine. Light roasts usually want a longer ratio (1:2.3 to 1:2.5) and higher temperature (94-95 °C) to avoid the sour, underdeveloped profile; medium-dark roasts take 1:1.8 to 1:2 at 91-93 °C, closer to the Italian template.

The critical piece of kit is not the machine but the grinder. A conical or flat-burr grinder produces a tight particle distribution, essential for espresso where a few microns rewrite flow time. Blade grinders are a dead end — they chop unevenly and make repeatability impossible. Budget-wise, a grinder that can genuinely pull espresso starts around 300 to 500 euros new, usually more than the first espresso machine most buyers pair with it.

The seven-step workflow: weigh the dose to 0.1 g, grind on demand (CO2 escapes within minutes), distribute evenly in the basket (WDT needle tool), tamp flat at roughly 15 kg — emphasis on level, not force. Start a 5-10 second low-pressure pre-infusion if the machine supports it. Then ramp to full pressure, targeting 25 to 30 seconds overall (pre-infusion included). Taste, log, adjust one variable at a time.

Common beginner defects are predictable: coarse grind giving a 15-second gusher (over-flow, under-extracted, sour-salty), poor distribution causing channeling (visible jets below the basket, spiky acidity), or hard water scaling the boiler. Ideal espresso water sits near 60-90 mg/L calcium, 20-40 mg/L magnesium and 40-75 mg/L alkalinity — many Belgian bottled waters qualify, while tap water in parts of Wallonia runs hard and benefits from filtration or blending with low-mineral bottled water.

Double espresso — steps and targets