Dialing in a pour-over

How to take a starting recipe and make it taste right for the coffee in front of you: one change at a time, taste before the timer, and the two things recipes leave out, the bloom and how you pour.

Pick one recipe and stay with it

Every pour-over recipe is a starting point, and most good ones land in the same place. What matters is choosing one, any of the recipes here or one you trust, and using it for every coffee until you know it well. Then each cup tells you something about the coffee, not about a recipe you changed last time.

Your recipe changes over time anyway. People who settle on their own way of brewing almost always got there by learning one recipe properly and adjusting it, not by trying a new one every morning.

Change one thing at a time

If you change the grind, the water temperature and the pour all at once and the cup gets better, you don't know which one did it, and you can't do it again. Change one thing, brew, taste, and write it down.

Work through them roughly in this order, since the first ones have the biggest effect and are the easiest to repeat. Ratio, grind and time has what sour, bitter, weak and muddy cups mean.

1. Grind: The biggest lever. Finer extracts more and slows the brew; coarser extracts less and speeds it up. Move a step or two at a time.
2. Ratio: If the flavor is right but the cup is too weak or too heavy, change the ratio, not the grind: 1:15 is stronger, 1:17 lighter.
3. Temperature: Hotter for dense, light-roasted coffees that taste sour; a few degrees cooler for darker roasts, and for naturals and anaerobic coffees that turn harsh.
4. How you pour: Agitation, below. Get it consistent before you start changing it on purpose.

Taste first, the timer second

Recipe times are a guide to roughly where you should be, not a target. Grinding finer and finer to hit a number on the timer is a common way to make coffee worse. If a cup tastes good and finished a little fast or slow, it's a good cup.

The time is most useful as a check. If one brew drains much faster or slower than usual with the same grind, something else changed: the pour, the filter paper or the coffee itself.

The bloom

The bloom is the first small pour, about two to three times the coffee's weight in water (30 to 45 g for 15 g of coffee), followed by a wait of 30 to 45 seconds. Fresh coffee is full of carbon dioxide from roasting, and the bloom lets it escape so the water that follows can reach the grounds evenly.

Make sure every bit of the grounds gets wet, with a gentle swirl or a stir. Very fresh and light-roasted coffees often want a slightly longer bloom; coffee that's weeks off roast barely bubbles, and the bloom matters less. If it puffs up a lot, that's a sign the coffee could use a few more days of rest.

Agitation: how you pour

Agitation is how much the water stirs up the grounds: how high you pour from, how fast, whether you circle or pour in the center, and whether you swirl or stir. More agitation extracts more, and it's the part of pour-over that recipes describe least and that varies most from person to person.

It's also the hardest thing to keep the same from cup to cup, so it's often why the same recipe tastes different on different days. Before you change anything else, aim for a pour you can repeat: a steady, gentle stream from close to the coffee bed, the same pattern every time.

More agitation: Pouring from higher or faster, more circling, a swirl after each pour. Extracts more and can help a sour cup, but it also stirs fine particles down into the filter, which can slow or stall the drain.
Less agitation: A slow, low pour, mostly in the center. A cleaner, clearer cup; often lets you grind a little finer without stalling. Pour-over attachments that spread the water out, like the Melodrip or Hario's Drip Assist, do this for you.
A gentle swirl at the end: Swirling the brewer once after the last pour levels the bed so it drains evenly. A small, consistent finish that most recipes here use.

Filter paper changes the brew

Papers drain at very different speeds. A faster paper (Cafec's T-90 and Abaca papers are popular for this) lets you grind finer without the brew taking forever, which many people find brings out more flavor. A slower or thicker paper does the opposite.

That means switching papers can change your brew as much as moving the grinder. When you change papers, start from your usual recipe and expect to adjust the grind. Always rinse the paper with hot water first, which also warms the brewer.

Different coffees want different things

Dense, high-grown, light-roasted washed coffees are the hardest to extract: they usually want a finer grind and water just off the boil. Naturals, anaerobic and other experimental coffees, and darker roasts, extract easily and can turn harsh or boozy; try a slightly coarser grind or cooler water.

Once you've dialed in a few coffees, you'll start to recognize these differences before you brew, and a new bag gets close on the first cup.

Keep notes

A few words per brew is enough: the coffee, how many days since roasting, the dose and water, the grind setting, the time, and what it tasted like. After a week you'll see patterns that are hard to notice from memory, and when a brew is great, you'll know exactly how to make it again.

Don't let it stop being fun. A cup that isn't perfect still tells you something, and the point is to enjoy the coffee.