A Guide for Pour-Over Coffee Beginners! Can You Brew Coffee with 100°C Water? What's the Purpose of Flow Restriction in Pour-Over Coffee? Is the Bitterness Really Most Concentrated in the Final Stage?

With its high tolerance for error and excellent flavor performance, pour-over coffee has become one of the leading extraction methods since the rise of specialty coffee. At the same time, because the operation is simple and the barrier to entry is low, many people have bought their own pour-over gear and started learning to brew at home.

Honestly, learning pour-over on your own isn't difficult, because the internet is so developed today. We can easily find all kinds of brewing tutorials online - equipment, steps, techniques, parameters, and plenty of other details, all available for free. But because the content is so sprawling and often lacks systematic organization, people frequently fall into cognitive and operational traps, unknowingly adding obstacles for themselves and making it hard to brew a delicious cup. So today, FrontStreet Coffee will share a few pitfalls beginners tend to hit, so you can watch out for them.

1. Misusing Parameters

Many people misunderstand how to use parameters. A common example: "The higher the water temperature you use, the better the beans." The implication is that only very high-quality beans can take relatively extreme parameters, such as brewing at 96°C or 97°C.

Granted, high-quality beans are less likely to fail even with extreme parameters, but we need to understand that parameter choices don't depend entirely on the beans; they are decided mainly by our brewing method and extraction setup. Take water temperature: it isn't the only variable affecting extraction. Besides temperature, there are grind size, time, and stirring method. As long as the other parameters are matched properly, we can brew a delicious pot of coffee even at 96°C, 98°C, or even 100°C.

The same principle applies in reverse to other parameters. Even if the coffee is ground very fine and the extraction time is long, a good cup can still come out - regardless of the quality of what you're brewing - provided the other parameters are reasonably matched.

2. Washing the Coffee Powder Wall Down with the Water Stream

Many people just starting out like to do one thing (FrontStreet Coffee included): using the water stream to wash down the coffee powder clinging to the edge of the dripper during brewing. The aim is simple - to let that portion of coffee extract too, since our pouring range generally doesn't reach the edges, and the grounds that have built up a wall along the edge never meet the hot water.

While this can indeed extract those edge grounds more fully, done improperly it easily makes an originally delicious coffee less delicious. The drippers in common use have flow guide ribs, and those ribs increase the space for the coffee to release gas while also enlarging the water channel. If we use hot water to wash down the edge powder with these drippers, the water poured onto the dripper will break straight through the filter paper and slip away along the edge, creating what is called bypass water.

Bypass water affects extraction and easily makes an existing coffee bland. It also thickens the powder bed and washes the fine powder that was stuck to the dripper edge down to the bottom, making drainage harder. So FrontStreet Coffee does not recommend doing this unconditionally. Although the grounds clinging to the dripper edge extract less fully than those being stirred, that difference in extraction rate can actually make the coffee more layered.

3. Pouring from Too High

As everyone knows, the height of the pour affects how strongly the water column agitates the bed. The higher the pour, the stronger the stirring force. So some people pour from a greater height than normal to get a higher extraction rate.

While a high pour can increase agitation, there are limits. FrontStreet Coffee has found that many people keep raising the pour height without restraint, and the coffee they brew ends up weaker, with a lower extraction rate than before. The reason is precisely the height. In the gap between leaving the kettle spout and touching the bed, the hot water is continuously losing heat to the surrounding air. The higher we pour, the more the water temperature drops. When the pour is too high, the hot water loses a great deal of temperature and reduces its extraction efficiency. (The Matsuya-style brewing method uses exactly this approach to lower water temperature.)

Moreover, if the poured stream isn't large enough, then at too great a height the hot water can't hold its column shape and breaks into intermittent droplets. Droplets can hardly stir the coffee bed, so extraction efficiency drops sharply. FrontStreet Coffee therefore doesn't recommend raising the pour position without limit. Usually, pouring from a distance of one fist above the bed is enough; a little higher, two fists.

4. "No Bulging During Blooming Means the Coffee Isn't Fresh"

Next are two topics FrontStreet Coffee is often asked about. Many people, after buying beans from FrontStreet Coffee's online store, report to customer service that the coffee bed doesn't bulge during blooming and ask whether the beans aren't fresh enough.

Of course not - FrontStreet Coffee ships beans roasted within five days, so there is no freshness issue. Whether the bed bulges into a big "hamburger" during blooming depends not only on the freshness of the beans but also on the extraction parameters. We all know the bulge is a phenomenon supported by carbon dioxide. Besides the roast level and freshness of the beans affecting the carbon dioxide content, whether the parameters are reasonable also affects how much the bed bulges, because the extraction efficiency determines how fast carbon dioxide is released.

Take water temperature again: the higher the temperature, the higher the extraction efficiency, and vice versa. At a higher temperature, carbon dioxide bursts out of the grounds faster and props up the "hamburger." If the temperature isn't that high, the release is slower, so naturally the bed won't bulge as much in a short time. The same applies to the grind. So the size of the bulge during blooming is affected not only by the freshness and roast level of the coffee but also by the extraction parameters. If the bulge is smaller than usual, then besides checking freshness, check whether the extraction parameters have changed.

5. Misunderstanding When Bitterness Appears

Many people hold certain misconceptions about when bitterness appears, believing that coffee's bitterness is mainly dissolved in the tail section of the brew. As a result, we often see people add "special" operations during brewing to avoid bitterness, such as flow stopping - cutting off the coffee liquid in the tail section so it doesn't reach the cup, in the hope that the coffee won't be bitter.

Obviously, this is a misunderstanding. Coffee's bitterness isn't dissolved only in the tail section. The misconception comes from misreading the sentence "the tail section is when bitterness substances are largely dissolved" as "bitterness is dissolved only in the tail section." In reality, from the moment water contacts the grounds, bitterness has already begun to release. It is just that bitterness substances dissolve relatively slowly, so even when extraction reaches the tail section - after the sour and sweet substances have dissolved almost completely - bitterness is still dissolving.

If we don't use the right extraction parameters, then even with flow stopping there will still be obvious bitterness, because the extraction efficiency is so high that bitterness has already dissolved in large amounts before the cut-off. So we need to understand that bitterness isn't dissolved only in the tail section, and the best way to avoid bitterness isn't flow stopping but controlling the extraction parameters well. Flow stopping is not an operation to be used at random. Those are some of the pitfalls FrontStreet Coffee has recently collected around learning pour-over on your own. Check whether you've run into any of them.

FrontStreet Coffee Recommendation

Once you have the parameters under control, the easiest way to keep improving is to brew beans that reward good technique. FrontStreet Gedding is the classic starting point: a washed Yirgacheffe that consistently shows citrus, berries, and florals with a green-tea sweetness, and acidity soft and bright enough that a beginner finds it easy to accept. A V60 is the brewer most often recommended to newcomers, because its fast, clean extraction makes these delicate flavors easier to bring out.

For a more vivid, fruit-forward cup, FrontStreet Hua Kui is one of the most successful star products of the specialty market in recent years, with tropical fruit aromatics of strawberry, passion fruit, jackfruit, and even lychee, clear sweetness, very low bitterness, and a smooth, juicy body. If you would rather have a bright, structured everyday bean, FrontStreet Kenya Little Tomato is a washed Kenyan with tomato, dark plum, and a full, juicy body and a clean, lingering finish.