How to Make Coffee with a Moka Pot

Hello, coffee lovers! We are back with our home brewing coffee tips! Today we are going to tell you a bit more about the moka pot!

It is a low-pressure brewing method invented by Alfonso Bialetti in 1933.

Its enormous success is due to its affordable price and compact, durable design, two elements that have made the moka pot one of the most widely used methods for brewing coffee at home.

Due to the way it works, the water in the boiler can reach high temperatures, sometimes exceeding 100°C under pressure, which can contribute to the extraction of bitter compounds from the coffee. That is why it is important to know a few tricks to brew it properly!

Before you begin

Make sure your moka pot meets the applicable safety standards and is made from food-safe materials.
Before using it for the first time, clean the moka pot according to the manufacturer’s instructions. Prepare and discard a couple of brews before making your first coffee.
Always check that the filter is clean and that there are no coffee residues obstructing the passage of water.
The gasket must always be clean and in good condition to ensure a proper seal during extraction.
Clean the boiler with a suitable descaling product, following the manufacturer’s recommendations. If vinegar is permitted, rinse thoroughly afterwards to avoid leaving any residual flavour.
Make sure the upper coffee collector is always clean. Otherwise, coffee oils can oxidise and give the coffee a rancid flavour.

How does it work?

Coffee extraction with this method occurs due to the pressure generated inside the boiler as the water heats up.

The bottom chamber contains water and air. As the temperature begins to rise, the air expands, pushing the water upwards through the filter funnel. As heating continues, water vapour also contributes to the pressure that drives the water through the coffee.

Once the water comes into contact with the ground coffee, the coffee becomes saturated and offers resistance to the flow of water. Pressure builds until the brewed coffee rises into the upper collector.

This means that the temperature during the first phase of extraction and the final phase will not necessarily be the same.

As the water level in the boiler drops below the bottom of the filter funnel, steam and hot water can begin to pass through the system, producing the characteristic sputtering sound at the end of brewing.

Excessive temperatures during the final stage can contribute to bitter, burnt or astringent flavours. It is advisable to remove the moka pot from the heat before vigorous sputtering begins and allow the remaining coffee to flow gently into the upper chamber.

Preparation

Heat the water beforehand and fill the boiler with hot water, keeping the level below the pressure valve. This helps reduce the time the moka pot spends on the heat. Handle the hot boiler carefully.
Place the ground coffee in the filter without pressing it down or overfilling it.
Place the moka pot over low heat so that the pressure rises gradually and the coffee flows steadily.
Once the coffee has finished brewing, stir it before serving to obtain a more homogeneous cup.

Some important tips

During extraction, you can keep the lid open to observe the coffee flow, taking care to avoid hot splashes and steam.
Some brewing techniques suggest lightly wetting the ground coffee before extraction. However, this is optional and is not necessary for a good moka pot brew.
For a cleaner cup, a compatible paper filter can be placed above the ground coffee, beneath the upper metal filter, provided it does not obstruct the flow or compromise the seal.
If the water is heating but no coffee comes out, remove the moka pot from the heat and allow it to cool completely. Check the filter, gasket and coffee bed for possible obstructions before using it again. Never attempt to open a hot, pressurised moka pot.