Does a Moka Pot Brew Real Espresso?
A moka pot does not brew espresso. It pushes hot water up through the grounds at roughly 1 to 2 bar, while an espresso machine runs at about 9 bar, so there is no thick crema and the cup is less concentrated. What the moka pot does deliver is a rich, full-bodied coffee with a heavier mouthfeel than drip.
Bialetti's design dates to 1933 in Crusinallo, northern Piedmont, with Alfonso Bialetti adapting the principle of a laundry boiler. A standard three-cup bialetti moka pot fills the basket with 15 to 18 grams of grounds. A six-cup model works well as two to three servings, since the brew strength stays the same.
The moka pot is a classic symbol of Italian coffee culture. With its octagonal aluminum body and simple, easy-to-use design, it has become the top choice at home for many coffee lovers. It doesn't require an expensive espresso machine to brew a rich, full-bodied cup of coffee. But is coffee brewed with a moka pot the same as espresso? How much does one cup actually hold? And how do you brew for multiple servings? This article will break down every aspect of this classic device, from the history of the moka pot's invention, its working principle, and brewing parameters, to the reasons why crema disappears, and will include practical advice and bean recommendations from Front Street Coffee.
The moka pot is an icon of Italian coffee culture and one of the most famous coffee brewing devices in the world. Its iconic design, ease of use, and widespread availability make it one of the coffee tools collected by many coffee enthusiasts.
Although not everyone has the money or the space at home for an espresso machine, people can still brew a pot of coffee just as rich as espresso using a moka pot at home. One of the pros and cons of brewing coffee with a moka pot is this: it is very convenient, and not everyone needs an espresso machine to brew coffee with rich crema.
History of the Moka Pot
The moka pot was invented in 1933 in Crusinallo, in northern Piedmont. Alfonso Bialetti returned to Piedmont after working for 10 years in the French aluminum industry. He set up his own workshop near his hometown and produced aluminum household products there. The most common story of how Bialetti came up with and made the moka pot is this: Bialetti's wife got the idea while doing laundry. The machine used for washing clothes was a bucket with a lid fitted with a tube. The soapy water in the bucket was heated to boiling, and due to thermal expansion, pressure was generated that pushed the water up through the tube and dispersed it over the clothes. With the help of Luigi De Ponti, Bialetti eventually developed a device for brewing coffee that worked on basically the same principle as the laundry machine.
How the Bialetti Moka Pot Works
Bialetti's moka pot has an octagonal shape and is made of aluminum, with a rubber handle for heat insulation. The device has three main parts: the bottom container holds the water, the middle metal filter holds the coffee grounds, and the top container holds the brewed coffee liquid.
When brewing coffee, the bottom chamber is filled with hot water, then the metal filter is installed on the bottom chamber and filled with coffee grounds, the top chamber is screwed on tightly, and finally the whole moka pot is placed on a heat source. When the water boils, steam is produced, the pressure in the bottom chamber increases, forcing the hot water through the coffee grounds in the middle and then pushing the hot water through the tube that runs through the upper and lower chambers into the top chamber.
Is Coffee Brewed with a Moka Pot the Same as Espresso?
Although coffee brewed with a moka pot is also very rich, and sometimes even has crema, it is not the same as the espresso we know today. Coffee brewed with a moka pot has a similar extraction yield to espresso, but the extraction pressure of the two is very different. The standard pressure of a modern espresso machine is at least 9 bars, while the pressure of a moka pot is around 1.5 bars.
The water temperature of a moka pot is also higher. The temperature at which water boils and produces large amounts of steam is about 100°C, while espresso machines usually operate at around 92 to 96°C. In fact, the extraction principle of the moka pot is very similar to that of the steam-driven espresso machines of the late 19th and early 20th centuries.
When the moka pot was invented, the espresso machine used in Italian cafés was called La Pavoni. When making coffee, the entire machine had to be placed on a flame to heat. Inside the machine, a tube led from a compartment at the bottom to a mass of ground coffee. When the water boiled, pressure formed, forcing steam and hot water through the tube and the coffee grounds. La Pavoni was a large commercial espresso machine designed to provide bars with quick coffee on demand. But this machine was too expensive, too bulky, and too heavy. Unless a family was wealthy, it was impossible for an ordinary household to own one. So the moka pot became a good choice.
Moka Pot Brewing Parameters
Making every kind of coffee has its parameters. For example, pour-over coffee emphasizes grind size, time, water temperature, and so on. But the principle of the moka pot is to use high temperature to turn water into steam, pushing hot water into the layers and then into the upper chamber. That means the water temperature and time are uncontrollable. The only controllable factors are the amount of coffee grounds and the coarseness of the moka pot coffee grounds.
For the coarseness of moka pot coffee grounds, Front Street chooses a slightly coarser grind than espresso. You can refer to the size of the gaps in the filter screen of the grounds basket; just make sure the coffee grounds do not fall into the bottom chamber. For the amount of coffee grounds, simply fill the grounds basket and tap it gently so the coffee grounds are evenly distributed.
As for the question of what coffee beans are suitable for brewing in a moka pot, since coffee brewed with a moka pot is relatively rich, Front Street recommends using a darker roast, which better brings out the coffee's full-bodied character. Therefore, Front Street recommends using the Brazil Queen Estate from the Front Street bean list.
Front Street Coffee: Brazil · Queen Estate
Region: Mogiana region, São Paulo State, Brazil
Altitude: 1400 m—1950 m
Variety: Yellow Bourbon
Processing method: Natural process
Flavor description: Nuts, cream, cane sugar, fermented fruit
Why Can't a Moka Pot Produce Crema?
Ordinary households without an espresso machine want to use a moka pot as a substitute, which means they have the same requirement for coffee brewed with a moka pot: crema. The most terrifying thing is none other than seeing that coffee brewed with a moka pot has no crema at all. The formation of crema is related to the roast level and freshness of the coffee beans.
After coffee beans are roasted, they need to go through a resting period to let the aroma molecules in the beans stabilize, so they can better express their flavor. Coffee beans sold on the market all have two key numbers printed on the packaging: one is the shelf life, and the other is the roast date. The shelf life is generally one year, but shelf life and peak flavor period are not the same thing. The peak flavor period should be about 30 to 45 days after the coffee beans' roast date, which includes the resting period. The darker the coffee beans are roasted, the longer the required resting period, and the more gas needs to be released, with the gas released mainly being carbon dioxide.
The longer the time since the roast date, the more flavor compounds in the coffee beans dissipate. Coffee beans that are past their peak flavor period but still within their shelf life are not undrinkable, but their flavor compounds have almost disappeared.
In espresso, that layer of fine crema is actually made up of countless carbon dioxide bubbles. The longer the coffee beans sit, the more their carbon dioxide content disappears, so the crema layer becomes thinner.
Front Street freshly roasts according to the roast level of the coffee beans based on the time they are sent to customers and reserves the resting period in advance. When customers receive Front Street's coffee beans, they can immediately open them, brew, and taste. If you're watching this, what are you still waiting for? Get started right away!
The above content is compiled by CoffeeHunters, a coffee news website.
