Start with the right dose
Use a dose suited to the basket and grind into a dry basket. Avoid piling in more coffee than the basket and machine allow; the correct dose varies with basket and coffee.
Distribute before pressing
Settle grounds across the basket so they are reasonably even. A funnel can help contain spills, but it is optional. Needles and elaborate stations are not prerequisites for making a drink.
Keep the tamper level
Use a tamper that fits the basket, rest the portafilter securely and press evenly. Focus on a consistent level surface rather than chasing a particular number of pounds of force. Keep fingers away from hot surfaces.
Inspect and learn
Brush loose grounds from the rim, lock the portafilter in as instructed and brew. Taste the result and record changes. If you buy a tamper, check its actual base diameter and return terms rather than relying only on the machine brand.
Further reading
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