The Most Common Mistakes When Preparing Espresso

Die häufigsten Fehler bei der Espresso Zubereitung

This article is specifically designed to help you recognize and avoid the most common mistakes in espresso preparation. As an award-winning roastery and member of the Specialty Coffee Association, we have made it our mission to share our love and knowledge of coffee. Our goal is for every espresso you prepare to not only taste good but also be a small masterpiece of coffee art.

Below, we will provide you with some basic yet crucial tips, based on the experiences and observations of our baristas, as well as insights gained from an instructive video. In this video, coffee experts Michel and Dani guide you through the typical pitfalls of espresso preparation and offer practical solutions to avoid them.

fehler espresso zubereitung

Whether you are an experienced barista or a coffee novice, the information in this article will help you deepen your understanding of the complexity and beauty of espresso preparation and elevate your skills to a new level. Let's begin the journey and discover the secrets of perfect espresso together.

Proper Handling of the Portafilter

The portafilter is a central element of any espresso machine and plays a crucial role in the quality of the final product. Regular and thorough cleaning of the portafilter is essential to ensure the best taste of your espresso.

Cleaning the Portafilter

The cleanliness of the portafilter directly influences the taste of the espresso. Coffee oils and residues can quickly accumulate in the basket and on the underside of the portafilter. These residues can become bitter and rancid, negatively affecting the taste of freshly brewed espresso. It is therefore important to clean the portafilter after each use to ensure consistently high quality espresso.

Mistakes that are easily overlooked

  1. Not cleaning thoroughly enough: Many baristas simply rinse the portafilter with water without making sure to remove all coffee residues. However, it is necessary to thoroughly brush the portafilter and treat it with a special cleaning agent for coffee machines to remove all oils and residues.
  2. Overlooking hidden areas: The rim of the portafilter, where it meets the group head, is a commonly overlooked area that needs thorough cleaning. Coffee residues here can damage the gasket and affect pressure stability during extraction.
  3. Irregular deep cleaning: In addition to daily cleaning, the portafilter should be deep-cleaned regularly. This involves disassembling and soaking it in special coffee machine cleaners to remove even the most stubborn deposits.

By avoiding these mistakes, you ensure that your espresso not only tastes good but also offers the aromatic complexity and finesse you expect from premium coffee. In our next section, we will discuss other important aspects of espresso preparation that are equally crucial for a perfect result. Stay tuned to deepen your barista knowledge!

Maintaining Your Espresso Machine

A well-maintained espresso machine is the key to an outstanding espresso. Regular cleaning and maintenance are essential to preserve your machine's functionality and ensure the quality of every single espresso.

Regular Cleaning and Its Importance

Regular cleaning of your espresso machine not only prevents technical problems but also directly influences the taste of your coffee. Limescale deposits, old coffee oils, and other residues can negatively affect water temperature and pressure, which in turn leads to an uneven or poor-quality espresso. Therefore, it is important to systematically clean both the visible parts of the machine and the interior.

Common Maintenance Mistakes

  1. Neglecting descaling: Many users wait too long to descale their machines. Hard water can lead to significant limescale buildup in the pipes, which reduces the machine's efficiency and can ultimately lead to costly repairs.
  2. Insufficient cleaning of the brew group: The brew group, through which hot water and espresso flow, must be cleaned daily to prevent the accumulation of coffee oils and residues. Overlooking this component can result in a bitter taste in the espresso.
  3. Ignoring nozzles and filters: The nozzles and filters of the machine are crucial for the even distribution of water over the coffee. If these are clogged, uneven extraction can occur, making the espresso watery or too concentrated.

Long-Term Effects of Neglected Maintenance

Neglecting regular maintenance not only leads to poorer coffee quality but can also significantly shorten the lifespan of your machine. Regular cleaning and maintenance are investments in the longevity and performance of your espresso machine, ensuring that every espresso meets the high standards you and your guests expect.

By following these maintenance tips, you can ensure that your espresso machine always functions optimally and that the coffee always develops its full aroma. In the next section of our article, we will focus on how to achieve the perfect grind for your espresso, another crucial step towards ideal coffee enjoyment.

Tamping: The Key to Perfect Extraction

Tamping, i.e., pressing the coffee grounds in the portafilter, is a crucial step in espresso preparation that is often underestimated. Proper tamping ensures even extraction of the coffee and prevents problems such as channeling, where water flows unevenly through the coffee powder.

Tamping Techniques

Effective tamping begins with the right tool, the tamper, which should fit perfectly into the portafilter. The pressure you exert during tamping must be strong and even to adequately compact the coffee powder. A common mistake is applying uneven pressure, which leads to a crooked coffee puck and, during extraction, a preferential water passage through less dense areas of the coffee puck.

Steps for proper tamping:

  1. Fill the portafilter evenly with coffee grounds. Make sure there are no empty spots or hills.
  2. Smooth the surface of the coffee grounds before applying pressure with the tamper. This step is often referred to as leveling.
  3. Place the tamper vertically on the coffee grounds and apply even pressure. About 15-20 kg of pressure is ideal.
  4. Rotate the tamper slightly to "seal" the coffee grounds, which helps eliminate small air pockets.

Leveling Before Tamping

Leveling, i.e., leveling the coffee grounds in the portafilter before tamping, is of great importance. Unevenness in the coffee grounds can lead to uneven extraction, as the water seeks the path of least resistance. Without correct leveling, water can form channels through the coffee grounds (channeling), leading to incomplete extraction of aromas and an uneven taste.

Tips for effective leveling:

  • Use a leveler, a special tool placed on the portafilter to evenly distribute the coffee grounds before tamping.
  • Gently tap the portafilter to distribute the coffee grounds. This can be done manually or with the help of a vibrating tool.
  • Ensure that the coffee grounds form as flat a surface as possible before tamping.

By carefully tamping and leveling, you ensure that your espresso not only tastes excellent but also has the quality and consistency you expect from a first-class coffee experience. In the next section of our article, we will discuss optimal care and water handling in your espresso machine to further enhance the quality of your espresso.

Recommendation: Our Best Espresso Beans

The first steps in the morning: optimally starting your espresso machine

Starting the day with a perfect espresso requires your espresso machine to be properly heated and prepared. These morning routines are crucial to maximizing the quality and taste of your espresso.

Heating up the machine

It is essential that the espresso machine is thoroughly heated before the first use of the day. This ensures that all parts of the machine, from the brew group to the boiler, have reached the optimal temperature to extract the espresso evenly. A machine that is not fully heated can result in an espresso that varies in temperature and extraction, often leading to a sour or flat taste.

Why heating is so important:

  • Temperature stability: A well-heated machine maintains a constant temperature throughout the brewing process, which is essential for extraction.
  • Even extraction: The heat ensures that the water flows evenly through the coffee grounds and the aromas are optimally extracted.

First espresso of the day

The first espresso of the day is often an indicator of how well the machine has been prepared and set. To ensure that this first espresso is free of any residues and cleaning agents, there are some important steps to follow.

Tips for a perfect first espresso:

  1. Flushing the brew group: Before preparing the first espresso, run hot water through the empty brew group. This removes any residues or leftover water from the previous day's cleaning.
  2. Cleaning the portafilter: Make sure the portafilter is clean and free of old coffee particles. A quick rinse and wipe before the first use can significantly improve the taste of the espresso.
  3. Preheating the cups: To enjoy the espresso at optimal temperature, the cups should be preheated. This prevents the espresso from cooling too quickly upon contact with the cup.

These morning routines help ensure that every day begins with an excellent espresso, setting the standard for every subsequent cup prepared throughout the day. In the following section, we will discuss the importance of water quality and its impact on espresso preparation.

The quality and treatment of water

Water is more than just an ingredient in espresso – it is the medium that extracts the aromas and oils from the coffee grounds. The quality of the water used therefore has an enormous influence on the taste and quality of your espresso.

Choosing the right water

Choosing the right water for espresso preparation is crucial. Soft to medium-hard water, rich in minerals but free of impurities or chlorine, is ideal. Water that is too hard can lead to limescale deposits in your machine and impair the taste of the coffee by masking its natural acids and aromas.

Impact of water quality on espresso:

  • Flavor profile: Minerals in the water can help highlight the coffee's flavor profiles. Too few minerals and the coffee can taste flat; too many and the coffee can appear over-extracted and bitter.
  • Acidity and bitterness: Water hardness affects the balance between acidity and bitterness in espresso. Softer water tends to produce a milder, sweeter espresso, while hard water can intensify bitterness.

Dealing with hard water

Hard water is a challenge for many baristas, especially in areas where tap water naturally has high calcium and magnesium levels. Regular maintenance and water treatment are necessary to ensure the quality of your espresso and extend the life of your machine.

Solutions and tips for dealing with hard water:

  1. Use a water filter: A good water filter can filter out most minerals and impurities that affect taste and lead to deposits in your machine.
  2. Regular descaling: Even with filtered water, you should regularly descale your espresso machine to remove limescale deposits that can accumulate over time.
  3. Test your water: It makes sense to regularly test your water to check the hardness level. This way you can determine the best settings for your water filtration and machine maintenance.

The right treatment and selection of water are crucial for the production of high-quality espresso. It is worth investing in these aspects to ensure that every sip of espresso is as delicious as it should be. In the next section of our article, we will focus on how to achieve the perfect grind for your espresso, another crucial step on the path to ideal coffee enjoyment.

The grind: the heart of good espresso

The quality of the grind is crucial for preparing excellent espresso. The grind size directly influences how water flows through the coffee powder and how the aromas and oils are extracted. A precise and even grind is therefore essential.

Importance of the grinder and grind size

A high-quality coffee grinder is an essential investment for any espresso lover. The grinder must be able to grind the coffee powder very finely and evenly, as this is the only way to achieve optimal extraction. The correct grind size is decisive for whether the espresso is extracted too quickly or too slowly, which in turn greatly influences the taste.

How grinder quality affects espresso:

  • Grind consistency: A good grinder delivers a consistent grind result, which is essential for uniform water passage through the coffee powder.
  • Adjustability of grind size: Different coffee varieties and brewing methods require adjustments to the grind size. A precisely adjustable grinder allows you to perfectly match the grind size to the respective coffee and your machine.


Grinding can be tricky, and often it's small mistakes that lead to a less than ideal espresso. Here are some typical mistakes and how to avoid them:

  1. Too fine or too coarse a grind: A grind that is too fine can cause the espresso to be over-extracted and taste bitter. If the grind is too coarse, the espresso will be under-extracted and taste sour. Experiment with small adjustments to find the perfect grind for your taste.
  2. Using an unsuitable grinder: Many beginners use grinders that are not suitable for espresso. Blade grinders or inexpensive conical grinders often cannot produce an even grind, leading to uneven extraction. Invest in a high-quality burr or disc grinder specifically designed for espresso.
  3. Not cleaning the grinder regularly: Coffee oils and fine coffee particles can accumulate in your grinder and negatively affect the taste. Regular cleaning is essential to ensure that your coffee powder remains fresh and pure.

Grinding is a critical step in espresso preparation that is often underestimated. A thorough understanding of the importance of grinding and dealing with common mistakes can significantly improve the quality of your espresso. In the next section of our article, we will delve deeper into the intricacies of espresso extraction and provide further tips to perfect your barista skills.

The ideal extraction

An excellent cup of espresso depends on perfect extraction. This means that the water flows through the coffee grounds at the right time and at the right temperature to extract the best aromas and ideal intensity.

Extraction time and temperature

The ideal extraction time for an espresso is typically between 25 and 30 seconds, from the moment the machine is activated until the last drop has passed through the coffee grounds. The optimal brewing temperature for extraction is usually between 90°C and 96°C. Deviations in time and temperature can significantly affect the taste of the espresso.

Guidelines for ideal extraction time and optimal brewing temperature:

  • Extraction time: Make sure the water flows through the coffee grounds neither too quickly nor too slowly. The time may vary slightly depending on the grind size and the amount of coffee used.
  • Brewing temperature: The temperature should be high enough to effectively extract the aromas and oils from the coffee, without burning the delicate flavor notes.

Avoiding under- and over-extraction

Under-extraction occurs when the water flows too quickly through the coffee grounds, often caused by too coarse a grind. The result is a watery espresso with a sour taste. Over-extraction, on the other hand, occurs when the water flows through the coffee grounds for too long, often due to too fine a grind. This leads to a bitter and harsh taste.

Detecting and correcting extraction errors:

  • Under-extraction: If your espresso tastes sour and has a pale crema, this could indicate under-extraction. Try to make the grind finer or increase the amount of coffee.
  • Over-extraction: A bitter taste and a very dark, dense crema indicate over-extraction. Adjust the grind a little coarser or reduce the amount of coffee.

By controlling these variables and experimenting regularly, you can optimize extraction and ensure that every espresso achieves the quality you desire. In the next section of our article, we will cover the importance of maintaining and caring for your espresso machine to ensure the best performance and highest quality of your espressos in the long term.

Conclusion and further tips

In this article, we have highlighted the most important aspects of espresso preparation to help you avoid common mistakes and improve your coffee. Careful selection of beans, correct handling of your portafilter machine, attention to grind details, and precise extraction are crucial for preparing an excellent espresso. Every step, from selecting the roasted coffee beans to storage and preparation, plays an important role in the final result – a delicious espresso.

Summary of key points:

  • Bean type and roast: The selection of the right espresso beans and an adequate roast are fundamental to optimizing the taste of the espresso.
  • Grind and portafilter machine: A correct grind and proper operation of the portafilter machine are crucial for avoiding errors in espresso preparation. Note that an incorrect grind can lead to under- or over-extraction.
  • Extraction process: The correct extraction time (e.g., 25 seconds) and a constant water temperature are essential to ensure optimal taste and the balance between acidity and bitterness.
  • Cleaning and maintenance: Regular cleaning and descaling of your machine are essential to consistently ensure good coffee and avoid technical problems.

By paying attention to these aspects and continuously refining your techniques, you can ensure that every espresso you prepare meets your high standards and reflects your love for coffee. We hope you find these tips useful and that they help you make your espresso better and get more out of each individual bean. Happy Brewing!

Frequently Asked Questions (FAQ)

How to make espresso properly?
To make espresso properly, evenly fill the portafilter with finely ground coffee, tamp the coffee powder firmly, and brew it with a pressure of about 9 bar for 25 to 30 seconds. Make sure your espresso machine is well heated and the water has an optimal temperature of about 90°C to 96°C.

Why no crema in espresso?
No crema in espresso can be due to several reasons, such as using coffee that is too old, a grind that is too coarse, insufficient brewing pressure, or an espresso machine that is not sufficiently preheated.

Why doesn't my espresso taste good?
If your espresso doesn't taste good, this could be due to various factors: wrong grind size, wrong water temperature, poor coffee bean quality, unsuitable water quality, or incorrect extraction time. Check and adjust these variables to improve the quality of your espresso.

How long should an espresso run?
An espresso should ideally run for between 25 and 30 seconds. This extraction time allows the rich aromas and oils to be efficiently extracted from the coffee grounds without the espresso being over-extracted and tasting bitter.