No Crema or Thin, Pale Espresso

Symptoms

• Espresso pours with little or no crema on top
• Crema is thin, pale, and dissipates within seconds
• Shot runs very fast (under 20 seconds for 36 g output)
• Espresso tastes watery, sour, or lacks body
• Stream appears blonde and translucent almost immediately after extraction begins

Likely Causes

1. Stale coffee beans. Beans more than 4–6 weeks past their roast date have lost the CO2 that produces crema. Pre-ground coffee goes stale within hours of grinding.
2. Grind too coarse. Water passes through the puck too quickly when the grind is too coarse, under-extracting the coffee and producing no crema.
3. Dose too low. Using less than 16 g in an 18 g basket creates gaps and channels in the puck, allowing water to rush through unevenly.
4. Brew temperature too low. If the thermoblock has not fully heated (check that the ready LED is illuminated with a steady light), extraction will be weak. Allow the full 3–5 minute warm-up before brewing.
5. Channelling. Cracks or uneven density in the coffee puck cause water to find a fast path through, over-extracting one area and under-extracting the rest. This produces thin, uneven crema.

Step-by-step Fix

1. Check your beans. Look for a roast date on the bag. Ideally, use beans roasted within the last 7–30 days. If your beans are older than 5 weeks, replace them with a fresh bag. Store beans in an opaque, airtight container at room temperature — never in the fridge or freezer.
2. Grind finer. Adjust your grinder to a finer setting. Pull a test shot. The target is 36 g of liquid from 18 g of grounds in 25–30 seconds. If the shot still runs fast, adjust your grinder finer by one small increment at a time.
3. Weigh your dose. Place the empty portafilter on a kitchen scale and tare it. Grind into the basket and check the weight reads 18.0 ± 0.5 g. Adjust the grind time on your grinder if it dispenses too little or too much.
4. Distribute and tamp evenly. After dosing, use the dosing funnel and give the portafilter a gentle shake or use a distribution tool to level the grounds. Tamp with firm, level pressure (approximately 15 kg). An uneven tamp creates channels.
5. Ensure the machine is fully heated. Wait until the ready LED is illuminated with a steady light. Run a blank flush (5 seconds of water through the empty group head) to stabilise the group head temperature before inserting the portafilter.
6. Check for channelling. If using the bottomless portafilter, watch the underside during extraction. Channelling appears as uneven, spurting streams rather than a single, centred flow. If you see this, focus on improving your distribution and tamping technique. Also check that the shower screen is clean and not blocked — remove and soak it weekly.
7. Pull a test shot. After making adjustments, pull a shot and time it. A well-extracted double espresso should be 18 g in, 36 g out, in 25–30 seconds. The crema should be thick, hazelnut-brown, and persist for at least 60 seconds.