A Beginner's Guide to Brewing Methods You'll Find in Bangkok Cafes

Brewing & Culture
Written By Tosapon Amornpitpratya

The Short Answer

When a Bangkok café menu lists something after “coffee” — espresso, V60, Chemex, French press, AeroPress, siphon, cold brew — it's usually naming a brewing method, not a flavor. Each method changes how water and ground coffee interact: how finely the coffee is ground, how hot the water is, how long it stays in contact with the grounds, whether the grounds sit fully submerged or have water pass through them continuously, and what kind of filter (if any) holds the spent grounds back. Those differences create real, describable tendencies in body, clarity, and acidity.

None of this comes with one universally “correct” recipe, though. Brew ratios and temperatures vary meaningfully between reputable sources and brewing traditions, and this guide presents them as ranges and principles rather than a single official rulebook. This article also doesn't claim to know how common any of these specific methods is at Bangkok cafés — that would require the kind of survey data this guide doesn't have — so it sticks to explaining what each method is and how it works, which is useful regardless of which of them you happen to run into on a given menu.

A Few Ideas Worth Understanding First

A handful of concepts show up across every brewing method below. Understanding them once here makes the rest of this guide easier to follow.

Grind Size

Coffee is ground to different finenesses depending on how long the water and grounds will be in contact and how the water moves through them. As a general principle: methods where water passes through the grounds quickly, or where the grounds are pressurized (like espresso), use a fine grind, close to powder; methods where grounds steep in water for several minutes or hours (like French press or cold brew) use a coarse grind, closer to breadcrumbs; pour-over methods typically fall in the middle. The underlying logic is contact time and surface area: a finer grind exposes more surface area to water and extracts faster, so it needs a shorter brew time to avoid over-extracting; a coarser grind extracts more slowly and can tolerate — or requires — a longer steep. Exact grind settings vary by grinder, bean, and personal taste, so this guide describes the general pattern rather than a specific numeric setting for each method.

Water Temperature

Most hot-brewing methods use water just off the boil, roughly in the 90–96°C range — cooler than a full rolling boil (100°C), which can over-extract and scald the grounds. That specific 90–96°C range is documented in an active Specialty Coffee Association equipment standard, though it's worth being precise about scope: that particular standard governs automatic home drip brewers specifically, and explicitly does not cover manual pour-over devices, French press, espresso machines, or pod brewers. In practice, most manual brewing guides recommend a similar range for those other methods too, but this guide presents that as a widely followed practice rather than something confirmed by the same standard.

Brew Ratio

“Brew ratio” means how much coffee you use relative to how much water — commonly written as a ratio like 1:15 or 1:17 (one gram of coffee per 15 or 17 grams of water). The same Specialty Coffee Association equipment standard referenced above specifies 55 grams of coffee per 1,000 grams (1 liter) of water — roughly a 1:18 ratio — as the standard test ratio for automatic home drip brewers specifically. Manual brewing guides for pour-over, French press, and other methods commonly recommend ratios in a broader range, and different reputable sources don't fully agree with each other on an exact number — this guide treats brew ratio as a starting point to adjust from, not a fixed law.

Extraction (Under- vs. Over-Extracted)

“Extraction” refers to how much of the soluble material in ground coffee actually dissolves into the water during brewing. Too little contact time, too coarse a grind, or too-cool water can leave a brew under-extracted, which tends to taste sour, thin, or grassy. Too much contact time, too fine a grind, or too-hot water can push a brew into over-extraction, which tends to taste bitter, harsh, or astringent. Industry practice for automatic drip brewing (per the same Specialty Coffee Association equipment standard) targets a specific total-dissolved-solids range as a proxy for good extraction — but that figure is standard-specific, not a universal number that applies identically to every brewing method, so it's presented here as a useful general concept rather than a number this guide asks you to hit with every method.

Pressure

Espresso is the outlier here: it's brewed by forcing hot water through finely-ground, tightly-packed coffee under significant pressure — commonly cited today as around 9 bar, roughly nine times normal atmospheric pressure. Every other method in this guide operates at or near atmospheric pressure; the AeroPress is a partial exception, using gentle hand pressure from a plunger, which is a meaningfully different (and much lower) kind of pressure than an espresso machine generates.

Immersion vs. Percolation

Some methods fully submerge coffee grounds in water for a set period before separating the two (immersion) — French press and cold brew both work this way. Others let water pass continuously through a bed of grounds and drain out the bottom (percolation, sometimes called “drip” or “filter” brewing) — pour-over and drip brewing work this way. Espresso is a pressurized form of percolation. AeroPress and siphon each combine both ideas in their own way, described in their sections below.

Filter Material

Paper filters (used in most pour-over methods and the AeroPress) trap more of the coffee's natural oils and very fine particles, producing a cleaner, lighter-bodied cup with less visible sediment. Metal mesh filters (used in a French press, and in some reusable pour-over filters) let more of those oils and fine particles through, producing a heavier-bodied, sometimes slightly cloudier cup. Neither is “better” — it's a genuine trade-off between clarity and body, not a quality difference.

Espresso

Espresso is coffee brewed by forcing hot water through a small, tightly-packed puck of finely-ground coffee under pressure, producing a small, concentrated shot topped with a thin layer of reddish-brown foam called crema. The name comes from the Italian for “expressed” or “pressed out,” reflecting its origin as coffee made to order for one person, on demand, rather than brewed in a large batch.

Espresso's defining pressure standard has an unusual history. The first patented espresso machines, from the early 1900s, used steam pressure of roughly 1.5 bar — enough to produce coffee quickly, but not enough to create crema or the concentrated body associated with espresso today. In 1947, a lever-piston design achieved roughly 9 bar of pressure for the first time, which is generally credited as the moment crema-topped, modern-style espresso became possible. That 9-bar figure (with a small tolerance range, commonly cited as 8–10 bar) has remained the industry's reference point since, including in current Specialty Coffee Association guidance for espresso equipment — though it's worth knowing this became the standard partly through mid-20th-century engineering trial and error rather than being derived from a single scientific optimum from the start.

Because espresso uses a very fine grind, high pressure, and a short brew time (typically in the range of 20–30 seconds, though this varies by machine, dose, and desired result), it produces a small volume of concentrated coffee — which is the basis for many espresso-based drinks (lattes, cappuccinos, flat whites, and others) that combine a shot with steamed or textured milk.

Pour-Over: V60, Chemex, and Other Drippers

Pour-over means pouring hot water by hand over coffee grounds held in a filter, letting gravity pull the brewed coffee through into a vessel below — a form of percolation brewing, done manually rather than by machine. Two devices come up constantly in specialty coffee: the Hario V60 and the Chemex.

The V60 is a cone-shaped dripper — the name refers to its 60-degree cone angle — originally developed by Hario, a Japanese glassware manufacturer. Hario had made coffee equipment (including its own syphon brewers) since the late 1940s and released an earlier cone-shaped dripper design in 1980, but the modern V60 was specifically developed in 2004 and released commercially in October 2005; it became widely known internationally after a barista used one to win the 2010 World Brewers Cup. Its spiral internal ribbing is a deliberate design choice that lets water and air flow more freely along the cone's sides, giving the person brewing more control over how fast water drains through — a feature Hario's own account of the design credits as the key technical breakthrough over earlier cone-shaped attempts.

The Chemex is an hourglass-shaped glass carafe with an integrated pour-over funnel, invented in 1941 by Peter Schlumbohm, a chemist, who designed it using laboratory-glass principles (its shape draws on the Erlenmeyer flask used in chemistry labs) and a distinctively thick, bonded paper filter. That thicker filter removes more oil and fine sediment than a typical V60 filter, which is generally why Chemex coffee is often described as an unusually clean, almost tea-like cup — a difference in equipment design and filter thickness, not a difference in the coffee itself.

Both devices are pour-over, but they're not identical: the V60's ribbed cone and large single hole are built to let water drain relatively quickly with an actively-poured technique, while the Chemex's thicker filter and different geometry generally slow drainage and remove more oils. Manual pour-over recipes vary by device, grind, and personal preference, and reputable sources don't converge on one universal number for ratio or time — a common general range cited across brewing guides falls roughly between 1:15 and 1:17 (coffee to water) with a total brew time of two to four minutes, but treat that as a starting point rather than a rule.

French Press

A French press is an immersion brewing device: a cylindrical pot with a metal mesh plunger. Coarsely-ground coffee steeps directly in hot water inside the pot for several minutes, and then the plunger is pressed down, separating the grounds from the brewed coffee below the mesh.

Despite the name, the design most commonly used today has more Italian and Swiss history behind it than French. An Italian patent resembling the modern French press design dates to 1929; the design most widely recognized today — a glass carafe in a metal frame, still sold under the name “Chambord” — was patented by a Swiss inventor in 1958 and was originally manufactured in France, which is likely where the “French press” name comes from despite the design's Italian and Swiss origins.

Because the coffee steeps directly in the water with no paper filter, and the metal mesh doesn't trap fine particles or natural coffee oils the way paper does, French press coffee typically has a heavier body, more visible sediment, and a fuller mouthfeel than pour-over or drip coffee — a direct result of the filtration method, not a sign of better or worse coffee.

AeroPress

The AeroPress is a manual device that combines immersion and light pressure: coffee grounds steep briefly in a cylindrical chamber, and then a plunger pushes the brewed coffee through a paper filter at the chamber's base, using gentle hand pressure (far lower than an espresso machine's pump pressure, but higher than gravity alone in pour-over brewing).

It was invented by Alan Adler, a Stanford engineering instructor better known at the time for the Aerobie flying ring, who began prototyping the device in his garage in 2003 after becoming frustrated with how a standard drip machine handled a single cup of coffee. After roughly two years and more than 30 prototypes, Adler introduced the finished AeroPress at a trade show in November 2005, explicitly designing it to shorten brew time and reduce bitterness and acidity compared to longer-contact methods.

Because it combines a short steep with paper filtration and light pressure, AeroPress results vary widely depending on grind, steep time, and pressing technique — it's a genuinely flexible device capable of producing a cup that leans toward pour-over-like clarity or toward something closer to a small, less concentrated espresso, depending on how it's used.

Siphon (Syphon)

A siphon (also spelled syphon) is a vacuum-brewing device using two connected glass chambers. As the lower chamber is heated, pressure pushes water up into the upper chamber, where it mixes with coffee grounds; when the heat source is removed, the vapor pressure in the lower chamber drops and pulls the brewed coffee back down through a filter, separating it from the grounds. It combines full immersion (grounds and water mix together in the upper chamber) with filtration (the return trip is filtered).

The earliest coffee siphons were developed in Europe in the 1830s, with a widely-recognized version of the modern double-chamber design patented in France in 1841. The style became commercially popular in the United States in the early 20th century, especially in hotels and cafés, and was a common household item from roughly the 1930s through the 1950s before declining in popularity as more convenient brewing equipment became available. Hario, the Japanese glassware brand also behind the V60, has produced siphon brewers since the 1940s, and the format has seen a documented resurgence within specialty coffee more broadly since the early 2000s, including dedicated siphon-brewing competitions that have run internationally since 2009. This guide is not able to say how common siphon brewing specifically is at Bangkok cafés — no adequate evidence for that claim was found — but the format is generally understood, industry-wide, as a more visually dramatic, hands-on brewing method than pour-over or immersion brewing, and one that shows up more often as a specialty or demonstration item than as an everyday house-brew method.

Cold Brew

Cold brew is a full-immersion method that uses cold or room-temperature water instead of hot water, steeping coarsely-ground coffee for an extended period — commonly 12 to 24 hours — before straining it. Because no heat is involved, cold brew extracts differently than hot brewing methods, generally producing a smoother, less bitter result, and it's typically served over ice or diluted, since the steeping process produces a concentrate stronger than a typical single-serve brew.

Cold brew is also a useful example of why this guide is cautious about repeating brewing folklore as settled fact: it's extremely common to see cold brew described as dramatically less acidic than hot-brewed coffee, but the actual research on this is more nuanced than that claim suggests. A peer-reviewed 2018 study directly comparing hot- and cold-brewed samples from the same coffees found that the two methods produced comparable pH levels — meaning cold brew wasn't meaningfully less acidic by that specific measure — while hot brew samples showed higher levels of titratable acid (a different way of measuring acidity, based on total acid content rather than pH) and higher antioxidant activity than their cold-brewed counterparts. In other words: cold brew does taste smoother and less sharp to most people, which is real and worth knowing, but the common explanation — “it's less acidic” — oversimplifies a more complicated chemical picture, and pH specifically may not be the reason for that smoother taste.

A Note on Thailand's Own Brewing Tradition

Before pour-over drippers and siphons became part of Bangkok's specialty coffee scene, Thailand already had its own filter-based brewing method. Traditional Thai coffee, known as kafae boran, is brewed by steeping dark-roasted grounds and pouring hot water through a long cloth filter sock — a percolation method that predates any of the equipment covered above reaching Thailand. It's a genuinely different tradition with its own history, covered in full in The History of Coffee Culture in Thailand and the Bangkok Coffee Guide Glossary — worth knowing about, since “brewing method” in a Bangkok context isn't only about the specialty-coffee equipment covered in this guide.

So Which One Should You Order or Try?

There's no objectively “best” method among these — they're different tools that produce different, equally legitimate results, and the right one depends on what you're in the mood for:

  • Want something concentrated, fast, and the base for a milk drink? Espresso.

  • Want a clean, bright, articulate cup that shows off a coffee's more delicate notes? Pour-over (V60 for a faster, more hands-on brew; Chemex for an especially clean, low-sediment cup).

  • Want something fuller-bodied, with more texture and visible sediment? French press.

  • Want something fast, portable, and flexible enough to lean either clean or concentrated depending on technique? AeroPress.

  • Want a slower, more visually engaging brewing experience? Siphon, where available.

  • Want something smooth, less sharp-tasting, and served cold? Cold brew.

If a menu doesn't explain what a term means, it's reasonable to just ask — even baristas' own preferred ratios and temperatures vary, so there's no “wrong” way to be curious about it.

Common Questions

Is espresso stronger than drip or pour-over coffee?
It depends what “stronger” means. Espresso is much more concentrated per ounce, but it's also served in a much smaller volume — a standard drip or pour-over cup is typically several times larger. Because of that, a full cup of drip coffee often contains more total caffeine than a single shot of espresso, even though the espresso tastes and feels more intense sip for sip. “Stronger-tasting” and “more total caffeine” are two different questions.

Is one brewing method always better than the others?
No. Each method covered here is a deliberate industry-standard technique used because it produces a specific, intentional style of result — not because it's a worse or incomplete version of another method.

Do I need special equipment to taste the difference between methods?
No — the differences described in this guide (body, clarity, acidity, concentration) are generally noticeable without any special training, though a trained palate can pick up more specific distinctions. Ordering the same coffee brewed two different ways, if a café offers that, is a genuinely useful way to taste these differences directly.

Is cold brew just iced coffee?
No, and this is a common mix-up. Iced coffee is usually hot-brewed coffee cooled down and poured over ice. Cold brew is steeped in cold water from the start, over many hours, which is a different process that produces a different result — see the Cold Brew section above.

Key Terms to Explore Next

Tosapon Amornpitpratya
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