Choose water by volume and coffee by weight
For an ordinary automatic filter machine, start with medium-ground coffee and fresh cold potable water. Use the filter shape and basket specified for your machine. The reservoir contains water only; milk, coffee, syrup and preheated kettle water do not belong there unless the manufacturer's instructions explicitly allow them.
Moccamaster specifies 60 g coffee per litre as a starting dose. That is about 1:16.7 coffee to brew water. It is a starting strength, not a universal preference or proof that any particular machine reaches an ideal extraction.
| Reservoir water | Coffee | Estimated drink at 2 g/g retention |
|---|---|---|
| 500 ml | 30 g | About 440 ml |
| 750 ml | 45 g | About 660 ml |
| 1 litre | 60 g | About 880 ml |
| 1.25 litres | 75 g | About 1.10 litres |
A full brew cycle
Check the manual's minimum and maximum batch. A half-litre recipe is unsuitable for a machine whose minimum is higher. Nominal cup counts differ; the litre or millilitre markings are more useful than assuming one cup means your mug.
- Start with a clean, cool basket and carafe. Fit the correct paper or approved reusable filter; do not double filters to slow the brew.
- Measure fresh cold water in a clean jug and fill the reservoir to the chosen amount.
- Weigh the corresponding coffee, add it to the filter and level the bed. Leave room for it to swell without reaching the rim.
- Seat the basket, carafe and brewing lid correctly. Open any manual drip stop and select the appropriate full- or half-batch setting if the machine offers one.
- Start brewing and let the cycle finish before opening the basket or removing hot parts. Use a pause-and-serve feature only within the manual's limits.
- Mix the carafe gently and pour. Record the batch, grind and approximate cycle time; do not restart water through the used grounds to stretch the drink.
- Switch off as required, let the machine cool, dispose of grounds and clean the carafe and basket.
Evidence: Moccamaster 741/CD/CDT manual: basket and drip-stop operation · National Coffee Association: drip coffee
A small batch is not a full batch divided by four
At a lower water volume, a machine may spend less time spraying the bed or distribute water differently. Use its small-batch mode if available. If a tiny brew tastes sharp while the normal batch is balanced, first test a batch inside the stated working range rather than immediately grinding powder-fine.
To learn your real output, measure one finished carafe. Grounds retention, the machine's plumbing and evaporation reduce output below the reservoir volume. A 1 litre fill is not a promise of four full 250 ml mugs.
For coffee held beyond immediate service, a clean insulated server can avoid continued hot-plate heating. Follow the manual for carafe compatibility: removing the supplied jug can leave a drip-stop valve closed and overflow the basket.
Fix the cause, not every setting
Some machines have no temperature control. Do not put hot water into the reservoir to compensate; choose adjustments the machine supports.
| Problem | First test |
|---|---|
| Balanced but too weak | Increase dose from 60 to 65 g per litre if the basket has room. |
| Balanced but too strong | Dilute the cup; next brew try 55 g per litre. |
| Sharp, thin, short brew | Check the minimum batch and use a slightly finer grind if flow remains safe. |
| Slow, harsh or overflowing | Stop the cycle safely. After cooling, check filter fit, drip-stop position and basket loading before trying coarser grounds. |
| Coffee becomes bitter while held | Compare a cup poured immediately with one left on the plate; shorten holding time. |
| Newly slow or cooler than before | Check the maker's cleaning/descaling instructions and water requirements. |
| Grounds in the carafe | Inspect a folded, torn, overfilled or wrong-sized filter. |
Cleaning and descaling solve different problems
Wash removable coffee-contact parts with the product allowed by the manual. Descaling addresses mineral deposits in the water path; it does not remove every coffee oil from a dirty carafe. The machine's recommended cleaner, rinse cycle and schedule take precedence over a generic vinegar recipe.
Unplug and cool the appliance before the specified maintenance. Never immerse the powered base. Rinse cleaning products fully and run the required clean-water cycles before making another drink. If leakage, electrical faults or a damaged cord appear, stop using the machine and seek proper service.
Evidence: Moccamaster KBGT: cleaning and descaling
Sources & limitations
This guide combines source-based explanations and practical starting points. Coffee Jacob has not performed hands-on product testing or controlled tasting trials for this guide. Source check: 13 October 2026.