How does a moka pot differ from a siphon in the cup?
The moka pot and the siphon use opposite extraction logic. A moka pot forces hot water up through the grounds with steam pressure, giving a heavier body, concentrated aroma and a thin layer of crema. A siphon relies on vacuum and full immersion, so the cup is cleaner and more balanced. Each suit different drinkers rather than one beating the other.
Moka pots are cheap, sturdy and forgiving, which is why beginners reach for them first. Siphons are rarer and involve a longer ritual of heating, stirring and cooling, but the reward is clarity and even extraction. Coffee taste is personal, so the choice comes down to whether a heavier shot or a clean, tea-like cup is what the drinker actually wants at home.
There are many types of coffee brewing equipment, and the moka pot and the siphon are two choices with completely different styles. The moka pot has become a common entry point for beginners thanks to its simple operation and rich taste, while the siphon attracts enthusiasts with its laboratory-like ritual and clean, balanced flavor. What are the differences between the two in extraction principles, pressure methods, and final taste? Starting from the practice at Front Street Coffee, this article sorts out in detail the structure, usage methods, and flavor performance of the moka pot and the siphon, helping you find the cup that suits you at home.
There are hundreds of devices that can be used to make coffee, but when it comes to which one brews a better cup, there is actually no standard answer. After all, everyone's taste preferences are different. Even if the same beans, the same set of equipment, and the same extraction time are used, each person's perception of acidity, bitterness, sweetness, body, and strength is different, not to mention that after switching to different equipment and adjusting different parameters, the flavor direction of each cup becomes even harder to predict.
Besides the espresso and pour-over commonly seen in cafés, many people first try making coffee themselves by starting with a moka pot. The reason is that it has an appealing look, is convenient to use, is affordable, and has a very low barrier to operation, making it quite friendly to beginners who are just getting into coffee.
However, Front Street Coffee has also noticed that some friends care more about the ritual of the making process, such as the siphon, which is increasingly hard to see nowadays. The device itself is eye-catching enough, and the operating steps are also unique. After trying it once, many people cannot help but want to buy a set to take home. So what exactly is the difference between these two brewing methods? And how big is the gap in taste? Next, let Front Street explain them one by one.
What is a moka pot?
The working principle of the moka pot is to use the steam pressure generated after the water in the lower chamber boils to force hot water directly through the coffee grounds, extracting the flavor substances from the coffee. The coffee obtained this way has a heavier mouthfeel, more concentrated aroma, and a thin layer of crema floating on the surface, which is exactly the charm of espresso.
Compared with other coffee equipment, the structure of the moka pot is quite simple, consisting of only three parts: the upper chamber that holds the coffee liquid, the filter basket that holds the coffee grounds, and the lower chamber that holds water for heating. When heating, the water in the lower chamber first heats up and turns into steam. After accumulating to a certain extent, it forms pressure and pushes the hot water to flow from bottom to top. After the hot water passes through the coffee grounds to complete extraction, the continuously increasing pressure pushes the coffee liquid further upward, eventually gathering in the upper chamber, and we get a relatively concentrated coffee liquid.
The extraction method of the moka pot is actually somewhat similar to the common pressure-based espresso. After the water in the base boils, it produces steam. The more steam gathers, the more pressure forms, forcing hot water through the coffee grounds, dissolving flavor components, and then spraying them with force into the upper container. The pressure produced by a moka pot is roughly between 1.2 and 3 atmospheres. The increase in pressure makes the coffee flavor more concentrated, so the coffee brewed with it also tends to have a fuller body.
Moka pots on the market are mainly divided into single-valve and dual-valve types. The dual-valve moka pot adds an extra pressure-regulating valve on top of the original design, resulting in greater pressure, higher coffee concentration, and more crema. Although a moka pot cannot reach the level of a standard espresso machine at 9 atmospheres or above, Front Street believes that if you just want a cup of rich, full-bodied coffee at home in your spare time, the moka pot is still a very worthwhile choice.
What is a siphon?
A set that looks like an instrument from a chemistry lab, paired with a halogen lamp or alcohol lamp. Through the light, you can see bubbles constantly churning in the hot water. The moment the coffee grounds are added, a soothing aroma drifts out. After the temperature drops, the liquid quickly returns, and the color becomes deep. Taking a small sip, the taste is round and balanced. Compared with other brewing methods, Front Street Coffee's deepest impression of the siphon is comfort and healing.
The English name of the siphon is “SIPHON,” so it is also called a siphon pot. Its principle is to use steam produced after water is heated, and with the force of thermal expansion and contraction, push the hot water in the lower chamber into the upper chamber to mix with coffee grounds. After the temperature drops, the water returns to the lower chamber through the vacuum tube, thereby producing coffee liquid. The origin of the siphon can be traced back to the early 19th century, nearly a hundred years earlier than pour-over coffee. According to relevant records, in 1826 the German physicist Johann Norremberg invented the siphon using laboratory equipment. His original intention was to demonstrate the power of steam to students, so he did not apply for a patent, and his design did not become popular. It was not until the mid-19th century that the French inventor Marie Fanny Amelne Massot improved this device, and the convection-type siphon was officially born. She obtained a patent in 1842, and this device was also able to enter the market for sale.
Around the same period, the Scottish engineer Robert Napier designed his Napier Coffee Pot, which also used the vacuum principle to brew coffee. Although this device won an award from the Institution of Mechanical Engineers in 1856, Napier never applied for a patent for it. After that, vacuum brewing devices of the same type gradually became popular across Europe and spread to places such as the United States. However, with the appearance of automatic drip coffee machines, Americans' use of siphons also gradually declined.
How do you use a moka pot? What does moka pot coffee taste like?
Before brewing coffee, you need to prepare fresh coffee beans, water, a grinder, a gas stove for heating (or an induction cooker), and of course the star of the show—the moka pot. As for the coffee beans, Front Street selected its own roasted “Sunflower Warm Sun Blend Coffee Beans,” a blend of Honduras Sherry and natural Yirgacheffe Red Cherry at a 7:3 ratio.
First remove the base of the moka pot and pour pure warm water into the lower chamber. This can shorten the brewing time and also prevent the coffee grounds from being heated too quickly, which can cause burnt and bitter flavors. Control the water amount to about 0.5 cm below the pressure relief valve line. The purpose of the safety valve is to prevent coffee grounds that are ground too fine from causing a blocked extraction channel and an explosion. If the safety valve is submerged in water and the extraction channel happens to be blocked, the consequences of the coffee pot exploding at high temperature are unimaginable.
To extract a rich black coffee, the grind size needs to be considerably finer than for regular pour-over. The Front Street store uses an EK-43s grinder at a setting of 0.5. The amount of grounds depends on the size of the moka pot. Here at Front Street, a three-cup Bialetti classic pot is used, with 18 g of grounds.
Pour the ground coffee into the filter basket, fill it to about nine-tenths full, smooth it with your finger, and then place it into the base. There is no need to tamp it firmly. If the coffee bed is too compact, it can easily block the upward flow of water and actually hinder extraction.
Next, screw the upper chamber and lower chamber tightly together, wipe the body dry with a towel, and place it on a gas stove or induction cooker to heat. When using an open flame, be careful that the flame does not extend beyond the range of the moka pot base.
Wait for the moka pot to heat up. After hearing a hissing sound, turn the heat to low, and the coffee liquid and crema will slowly flow out. When you see the coffee liquid in the upper chamber is half full, you can turn off the heat source, move the pot to the table, and use the residual heat and remaining pressure inside the pot to continue extracting the rest of the coffee liquid.
Finally, pour the extracted coffee liquid into a cup. It can be drunk directly, and the taste is very rich and solid. On the palate there are intense whisky aromas, vanilla, creamy, and the sweet-tart notes of berries, along with the aroma of roasted nuts. Friends who usually like Americano are advised by Front Street to dilute it with hot water at 70–80°C at a 1:5 ratio, stir well, and then drink it; it will show fresh fruity sweet-tartness. If you prefer coffee with milk, you can also pair moka pot coffee with milk, and it will taste of chocolate and creamy cookies.
Is brewing coffee with a siphon difficult to operate? What does siphon coffee taste like?
This time, Front Street will use a fast-paced extraction plan, paired with a light-roasted coffee bean—Kenya Asalia. Therefore, the water temperature will be relatively high, about 92°C, which means sealing it when the lower chamber is boiling with frequent bubbles. Since the extraction time is not long, only 60 seconds, and the coffee beans are relatively lightly roasted, a grind two degrees finer than pour-over will be used here, EK43 setting 9, with a No. 20 sieve at 90% pass rate. The coffee-to-water ratio is 1:14, that is, 20 g of coffee grounds with 280 ml of hot water.
First, prepare all the equipment properly, then pour the target amount of water into the lower chamber.
After pouring, remember to wipe away the water droplets on the lower chamber with a dry cloth to avoid the risk of the pot exploding.
After wiping, first install the filter device into the upper chamber. The specific operation is to place the chain from inside the upper chamber downward, then forcefully hook the chain's hook onto the tube. This allows the filter device to tightly block the outlet of the upper chamber and prevent too much coffee residue from seeping into the lower chamber! At the same time, it can also effectively slow down the water flow rate.
After installation, you can place the upper chamber onto the lower chamber. Remember to make sure the chain can touch the bottom, and then begin heating.
When the lower chamber starts to continuously produce small water droplets, do not rush. Wait until the small droplets turn into large droplets, then straighten the upper chamber and press it in, causing the lower chamber to enter a vacuum state. After that, simply wait for all the hot water in the lower chamber to rise into the upper chamber, and then extraction can begin!
Start timing at the same time the coffee grounds are poured in, then perform the first stir.
This stir is to allow the coffee grounds to fully saturate, equivalent to the bloom in pour-over coffee, so first use a tapping method to tap all the coffee grounds into the water so they absorb water evenly.
When the time reaches 25 seconds, perform the second stir. The purpose of this stir is to accelerate the dissolution of coffee flavor substances, so a technique with relatively higher stirring intensity can be used. For example, Front Street currently uses the Z-shaped stirring method, stirring the coffee grounds by drawing Z shapes back and forth, for 10 seconds.
When the time reaches 50 seconds, perform the final stir. This stir is also to increase the dissolution of coffee substances, but the difference is that at this point extraction has reached the final stage, and not much sweet-tart material remains in the coffee, so the stirring force needs to be reduced. For example, Front Street currently uses the circular stirring method, slowly drawing circles. At 55 seconds, remove the heat source and wait for the coffee liquid to return. If the coffee liquid returns very slowly, you can wipe the lower chamber with a wet cloth to accelerate cooling, speed up the return of the coffee liquid, and avoid the risk of over-extraction.
When the coffee liquid has completely returned to the lower chamber, extraction is finished. At this time, the poured siphon coffee may be a bit hot, so let it sit for a while before tasting~
After letting it sit for a moment, Front Street tasted it! In addition to Kenya's bright notes of small tomato and smoked plum acidity, there were also sweetness of yellow sugar and apricot. The overall mouthfeel was thick and round. Although the layers were not as distinct as pour-over, siphon coffee indeed tastes more solid, and the aroma is more prominent. It is a completely different experience~
The above content is compiled by CoffeeHunters, a coffee news website.
