Geimori Coffee Knowledge
Your shot tastes fine, but there is hardly any crema on top. Before you replace your espresso machine, check the coffee itself: roast age, grind, dose and basket fit often explain more than the pressure number on the box.
Quick answer: Crema is foam formed when dissolved gas escapes during espresso extraction. Very little crema can come from older beans, pre-ground coffee or the way the shot is prepared. A thick layer is not a reliable score for flavor.
What crema actually is
Crema is the tan foam on top of freshly brewed espresso. Pressure helps disperse carbon dioxide from coffee into tiny bubbles stabilized by compounds in the brew. Freshly roasted coffee usually releases more gas, but the amount also changes with roast style, bean variety and preparation.
Crema can smell wonderful, yet it may taste bitter by itself. A great shot does not need to wear a giant hat of foam. Stir, taste and judge the full drink before deciding something is wrong.
Five things to check when crema is missing
- Bean age: If beans have sat open for weeks, much of their remaining gas may have escaped. Try a reasonably fresh, well-stored bag. Beans straight out of the roaster can also be too gassy; resting time depends on roast and intended brew.
- Pre-ground versus whole bean: Grinding speeds gas loss and staling. If you can, grind only the dose needed right before brewing.
- Grind size: A shot that races through the basket often needs a finer grind or a different dose. Avoid judging by crema alone; use beverage weight and taste.
- Basket and dose: Match the dose to the basket's intended range. Overfilling or underfilling may disrupt puck preparation and water flow.
- Preparation: Warm the machine and portafilter as directed, distribute grounds evenly, tamp level and keep the basket clean.
A 10-minute troubleshooting recipe
Start with a double basket that fits about 18 grams, if your machine's basket supports it. Weigh 18 g in, aim for roughly 36 g out, and watch the shot time as a diagnostic clue rather than a fixed pass/fail threshold. If it sprays or gushes, adjust finer and check distribution. If the flow stalls, go coarser.
Keep the beans and recipe constant across attempts. Change one thing at a time, write down what you changed, and taste the shot. For a deeper explanation, our espresso grind-size guide walks through flow and flavor.
When less crema is completely normal
Some lighter roasts, older coffee or lower-gas coffees naturally produce a thinner layer. High-crema blends are not automatically sweeter or more balanced than low-crema coffees. If your espresso is pleasant, has a repeatable yield and suits your taste, there is no reason to chase a specific crema thickness.
Want more repeatable espresso?
A dedicated burr grinder gives you finer adjustment between shots. Choose by your routine, not by crema thickness alone.
