How to Make Better Drip Coffee

An automatic drip machine does the pouring for you, which makes it the easiest way on this site to brew several cups at once. Its reputation for mediocre coffee is mostly undeserved. Most bad drip coffee comes down to three fixable things: too little coffee, a dirty machine, and a pot left cooking on the warming plate.

Fix those and even a basic machine makes a clean, balanced cup. This page covers each one, and how to tell when the machine itself is the problem.

Start with this recipe

For about 14 ounces of coffee: two small mugs, or one large one.

1. Put a paper filter in the basket and rinse it with hot water. Empty the rinse water out of the carafe.
2. Add 30g of coffee, ground medium, and give the basket a gentle shake to level the bed.
3. Fill the reservoir with 480g of fresh, cold water.
4. Start the machine and leave it alone until it finishes.
5. Swirl the carafe before you pour. The first coffee to drip through is much stronger than the last, and the two need mixing.

No scale? 30g is about 6 level tablespoons. See how much coffee per cup for spoon measurements and why they drift.

How much coffee for a bigger pot

Keep the ratio at 1:16, about 1g of coffee for every 16g of water, at any size:

You get back less than you put in because the wet grounds hold on to about twice their own weight in water. For other amounts, use the ratio calculator.

Filling to the lines on the machine? Use one level standard scoop, two tablespoons, per cup marked on the machine. Those cups are 5 or 6 ounces, not 8; see what a coffee maker’s cup really means.

For stronger coffee, go to 1:15 or 1:14. For lighter coffee, 1:17 or 1:18. Making coffee for a party or a meeting? See how much coffee for a crowd.

Adjust the grind to the batch

A full basket makes a deeper bed of coffee, and water takes longer to work its way through it. A small batch drains through a shallow bed quickly. So:

• For a full pot, grind a little coarser than you would for two mugs.
• For a small batch, grind a little finer. If your machine has a small-batch setting, often labeled 1–4 cups, use it. It slows the water down so a shallow bed has time to brew.

Many machines make thin coffee when asked for only a cup or two. If you brew one mug at a time, an AeroPress or pourover will usually do it better.

Is your machine the problem?

It has to brew hot

Coffee extracts well with water around 195–205°F / 91–96°C. A machine that brews cooler makes sour, thin coffee however you adjust the grind.

The telltale sign is a cup that stays sour and thin even after you grind finer, from a machine you know is clean and descaled. At that point the fix is a better machine, or a kettle and a pourover cone.

If you are buying one, the Specialty Coffee Association certifies home brewers that brew in roughly that temperature range and finish a full batch in four to eight minutes. Its certified list is a good shortlist. See what to buy for your first coffee setup for the rest.

It has to wet all the coffee

The spray head should soak the whole bed evenly. If water drills into one spot, the coffee around it barely brews, and the cup tastes sour and bitter at once. Level the grounds before you start and keep the spray head clean. Do not stir during the brew unless the manual says to.

Filters

Use the shape your basket takes. Flat-bottomed baskets take basket filters; cone-shaped ones take cone filters, usually size #4 for a full-size machine. With a cone filter, fold the crimped seams along the bottom and side before you put it in, so it sits flat against the basket instead of folding over and letting grounds past.

Paper or metal:

• Paper gives a cleaner cup with less sediment.
• Metal lets through more oils, body, and fine particles.

Neither is better; pick the texture you prefer. Rinse paper filters before brewing, especially brown unbleached ones, which can leave a papery taste. Paper also holds back cafestol, a compound in coffee oil that raises cholesterol; see filtered vs unfiltered coffee.

Pre-ground coffee works well here

Drip is the most forgiving method on this site for pre-ground coffee, because most bags simply labeled “ground” are ground medium, for drip machines. Buy small bags, keep them sealed, and finish them quickly; ground coffee fades faster than whole beans. See how to store coffee beans.

A burr grinder will still improve the cup, because fresh coffee tastes better. It is not where to start, though. A measured dose and a clean machine come first.

Get it off the warming plate

A warming plate keeps heating the coffee after the brew is done. Within about half an hour the flavor fades and turns stewed and bitter, and it only gets worse from there.

• Brew what you will drink in the next half hour, and switch the plate off.
• Use a thermal carafe if your machine has one, and preheat it with hot tap water first.
• Or pour the batch into a vacuum flask as soon as it finishes.

Fix the cup

Change one thing, brew again, and make a short note. Changing dose, grind, and water together makes the result impossible to read. The grind guide covers how far to move the dial, and the Brew Compass turns any of these into one change for the next pot.

Keep the machine clean

• After each brew, throw out the grounds and rinse the basket and carafe. Leave the lid open so the reservoir and spray head dry.
• Every week or so, wash the basket and carafe with warm, soapy water. Coffee oils build up and go rancid, and that stale taste ends up in every pot.
• Descale regularly. Scale builds up inside the heater, slows the brew, and can stop the water getting properly hot. How often depends on your water: every month or two with hard water, every few months with soft, or whenever the machine’s descale light comes on.

Use the descaler or method your manual recommends. Vinegar is common, but some manufacturers advise against it. Either way, run two or three cycles of plain water afterward so the next pot does not taste of it. Water for coffee explains why hard water builds scale faster.

If you like what drip does but want more control over the result, pourover is the same process done by hand.