What the puck needs to do
The puck is the compressed coffee bed in the portafilter. During brewing, water should flow through it as evenly as possible. Large differences in distribution or density encourage preferential flow paths. Preparation therefore aims for a level, even bed and a repeatable workflow. This function matters more than the number of tools or steps used.
Start with a clean basket
Remove old grounds and dry the inside of the basket. Check the holes for residue and use a basket size suited to the dose. Keeping the basket in the same condition before every shot removes one possible source of variation. This short preparation makes later comparisons more meaningful.
Weigh the coffee actually in the basket. If you use a dosing cup, check whether grounds remain in it. An 18-gram recipe is only reproducible if roughly that amount reaches the basket.
A simple process
- Grind the appropriate dose into the dry basket or transfer it completely from a suitable dosing cup.
- Distribute the grounds so no large mounds or visible gaps remain.
- Level with a calm, repeatable technique. Avoid frantic knocking and spilling.
- Tamp level and evenly. Remove loose grounds from the rim.
- Gently lock in the portafilter and start extraction without an unnecessarily long pause.
Do I need a distribution tool?
A suitable tool can help break up clumps. But it cannot replace the right dose and an appropriate grind setting. If you use one, work consistently and avoid scratching the basket with unsuitable materials. Judge its value by repeatability and taste, not by the length of the ritual.
Space below the shower
The puck needs the space intended by the system. An imprint after brewing can result from changes in the wet bed and is not the same as clear contact before brewing. If your dry preparation already touches the shower screen, check the dose and basket size.
A wet puck is no report card
A wet or crumbly puck after extraction does not alone prove bad espresso. Machine, valve function, basket and quantity affect its condition. Judge the drink, process and repeatability first. The cup matters more than a perfect knock-out photo.
When extraction sprays
First check the basics: dry basket, same dose, even distribution, level tamp and suitable setting. Do not change all the tools at once. A bottomless portafilter can provide clues but is not essential for good coffee.
The shortest reliable routine
Choose the shortest sequence that reliably gives you consistent results. If two extra steps offer no identifiable benefit, you can leave them out. Good preparation should make your routine calmer.