Casabrews 20 Bar Espresso Machine: How to Use for Perfect Crema
There’s something genuinely magical about pulling your first shot of espresso from a quality machine at home. The sound of the pump, the aroma that fills your kitchen, and that beautiful golden crema sitting on top of your cup—it’s the kind of experience that transforms your daily coffee routine from mundane to memorable. If you’ve just invested in a Casabrews 20 bar espresso machine, you’re probably excited but maybe a little overwhelmed about where to start. Don’t worry; I’m going to walk you through everything you need to know to brew exceptional espresso with perfect crema every single time.
Understanding Your Casabrews 20 Bar Espresso Machine
Before we dive into the actual brewing process, let’s talk about what makes your Casabrews machine special. The “20 bar” specification refers to the pressure this machine generates, and pressure is absolutely crucial for espresso making. Think of it like this: regular coffee makers use gravity to push water through grounds, but espresso machines use force—lots of it. That force is what extracts the rich flavors, oils, and crema that make espresso so distinctive and satisfying.
Your Casabrews 20 bar espresso machine comes equipped with professional-grade components designed to deliver café-quality results right in your home. Understanding how these components work together will make you a more confident and skilled espresso maker.
Key Components You Should Know
- The Group Head: This is where your portafilter attaches and where the magic happens. Hot water flows through here under pressure.
- The Portafilter: This is essentially the basket holder that grips your espresso grounds during extraction.
- The Basket: The removable metal cup that actually holds your ground coffee.
- The Steam Wand: Perfect for frothing milk if you want to make cappuccinos or lattes.
- The Boiler: This heats water to the proper temperature for extraction.
- The Pump: This is what creates that impressive 20 bar pressure.
Preparation: Setting Up Your Machine Correctly
Getting ready to make espresso is actually just as important as the brewing itself. Many beginners skip the prep work and wonder why their results aren’t consistent. Here’s what you need to do first.
Initial Machine Warm-Up
When you turn on your Casabrews machine for the first time each day, patience is your friend. Allow the machine to heat up for at least 10 to 15 minutes. You’ll notice that most machines have a small light indicator that turns off when the optimal temperature is reached. This warm-up period ensures that both your boiler and group head are at the correct temperature for extraction.
During this warm-up time, do yourself a favor and run some water through the group head without any coffee in it. This process, called “flushing,” removes any residual coffee particles and ensures consistent water temperature. It’s a simple step that makes a noticeable difference in your final cup.
Choosing the Right Coffee Beans
Your espresso is only as good as the beans you use. I cannot stress this enough. You need fresh, quality beans roasted specifically for espresso. Light roasts might seem appealing, but espresso machines really shine with medium to medium-dark roasts that have had time to develop complex flavors and oils.
Look for beans that have been roasted within the last two to four weeks. Older beans lose their essential oils and aromatic compounds, which means your crema won’t be as rich or flavorful. Buy smaller quantities more frequently rather than stockpiling large bags.
Investing in a Burr Grinder
This is non-negotiable: you need a burr grinder, not a blade grinder. A burr grinder produces consistently sized particles, while blade grinders create dust and chunks—a recipe for uneven extraction and disappointing espresso. Yes, a good burr grinder is an additional investment, but it’s absolutely worth it.
For your Casabrews 20 bar machine, aim for a medium-fine grind. It should feel slightly grainier than sand but finer than what you’d use for a regular coffee maker. You’ll know you’re in the right ballpark when water takes about 25 to 30 seconds to flow through a properly dosed portafilter.
The Art of Grinding and Dosing
Now we’re getting to the technical heart of espresso making. Grinding and dosing—determining how much coffee you use—are where most home baristas either succeed or struggle.
Finding Your Ideal Dose
The general rule of thumb is about 18 to 20 grams of ground coffee for a double shot. However, this can vary depending on your specific portafilter basket and personal preferences. The easiest way to figure out your sweet spot is to invest in a small digital scale that measures in tenths of grams.
Start with 18 grams and see how the extraction goes. If the espresso pours too quickly (in less than 20 seconds), you need to dose more coffee. If it takes more than 35 seconds to pour, you’re using too much.
Grinding Right Before Brewing
Never grind your coffee in advance. The second you grind beans, they begin losing their volatile aromatic compounds. Grind immediately before you plan to brew. This freshness is what transforms a good espresso into a truly memorable one.
Set your grinder to the correct setting, and grind directly into your portafilter basket. This saves you from transferring the grounds multiple times, which causes some of the finer particles to settle at the bottom.
The Tamping Technique: More Important Than You Think
Here’s where I see a lot of home espresso makers go wrong. They grind properly, dose correctly, and then apply uneven pressure while tamping. It’s like building a house with a solid foundation but a crooked frame—eventually, everything falls apart.
How to Tamp Like a Professional
Tamping is the process of compressing your ground coffee into a tight puck. This resistance forces water to extract the espresso more slowly and evenly, which is essential for proper flavor development and crema formation.
Here’s the proper technique:
- Hold the portafilter level on your work surface
- Distribute the grounds evenly using a WDT (Weiss Distribution Technique) tool or even just a toothpick
- Place your tamper on top of the grounds
- Apply steady, even pressure—about 30 pounds of force
- Twist the tamper slightly as you lift away
- The result should be a flat, even, smooth coffee puck
Consistency is absolutely critical here. Practice getting your tamping technique down until you can do it the same way every single time. Many espresso enthusiasts eventually purchase an automatic tamper to eliminate variables, but manual tamping works perfectly fine once you master it.
Distribution Before Tamping
Before you tamp, take a moment to distribute your grounds. Uneven distribution means water will find paths of least resistance, leading to over-extraction in some areas and under-extraction in others. This results in inconsistent flavor and weak crema. A simple WDT tool made of 0.75mm stainless steel pins helps break up clumps and distribute grounds evenly throughout the basket.
Extracting Your First Shot: The Moment of Truth
This is where everything comes together. You’ve prepared your machine, ground your beans, and tamped your coffee. Now it’s time to actually pull a shot.
Attaching the Portafilter
Insert your loaded portafilter into the group head. You’ll want to lock it in firmly, using a slight twisting motion. You should feel it click or seat completely into the group head. A loose connection means pressure will escape and your extraction will fail.
The Extraction Process
Now engage your machine. On most Casabrews models, there’s either a button or a lever you’ll use to start the pump. Water will immediately begin flowing through your coffee. This is where you watch and learn.
Your goal is “pulling” a shot that takes between 25 and 30 seconds from the moment the pump engages to when all the espresso has flowed into your cup. Here’s what you’ll observe during extraction:
- 0-2 seconds: Pre-infusion begins, and you’ll see water start to drip
- 2-10 seconds: The coffee blooms as CO2 escapes, and the flow increases
- 10-25 seconds: The main extraction happens—this is where flavors are pulled from the grounds
- 25-30 seconds: The shot should be nearly complete, producing a rich, golden brown liquid
If your extraction completes in less than 20 seconds, your coffee is under-extracted, which usually means your grind is too coarse or your tamp wasn’t firm enough. If it takes more than 35 seconds, your coffee is over-extracted, and it will taste bitter and unpleasant. Adjust your grind size slightly finer or coarser accordingly.
Understanding Crema: The Golden Crown
That gorgeous golden-brown foam on top of your espresso shot—that’s crema, and it’s actually the indicator of a properly executed extraction. Crema forms when pressurized water forces CO2 and coffee oils to emulsify, creating those beautiful bubbles.
If you’re not getting crema, it usually means one of several things: your coffee isn’t fresh, your grind is too coarse, your tamp isn’t firm enough, or your water isn’t hot enough. Troubleshoot these variables one at a time.
A thin layer of crema isn’t ideal either. You want roughly a quarter-inch of that golden foam. This is another sign that your extraction parameters need adjusting.
Perfecting Your Technique: Troubleshooting Common Issues
Even experienced espresso makers encounter problems sometimes. Don’t get discouraged if your first few shots aren’t perfect. This is a learning process, and every adjustment teaches you something valuable.
What to Do If Your Espresso Tastes Sour
Sour espresso means under-extraction. Your water didn’t spend enough time with your coffee grounds. To fix this, try these adjustments:
- Make your grind slightly finer
- Increase your dose by adding a bit more coffee
- Tamp with slightly more pressure
- Check that your water temperature is hot enough
What to Do If Your Espresso Tastes Bitter
Bitter flavor indicates over-extraction. Your water spent too much time pulling flavors from the grounds. Reverse your approach:
- Make your grind slightly coarser
- Reduce your dose slightly
- Tamp with a bit less pressure
- Check that your machine isn’t running hotter than it should
When Your Machine Produces Weak Espresso
If your shots taste weak and watery despite a proper extraction time, the issue is usually insufficient pressure or a cracked seal. Check your group head gasket and make sure your portafilter is seated properly. If you’ve just started using the machine, it might need more warm-up time than you think.
Maintenance: Keeping Your Casabrews Machine in Top Shape
A well-maintained espresso machine produces better espresso and lasts longer. It’s that simple.
Daily Cleaning Routine
After every shot, remove the portafilter and empty the grounds. Rinse the portafilter under water, and run water through the group head for a few seconds to flush out any remaining particles. This prevents old coffee from tainting your next extraction.
Clean your steam wand immediately after frothing milk. Milk residue hardens quickly and becomes nearly impossible to remove if you let it sit.
Weekly Deep Cleaning
Once a week, soak your portafilter and baskets in a mixture of espresso machine cleaner and hot water for about 15 minutes. This removes built-up coffee oils that regular rinsing doesn’t eliminate. After soaking, brush them gently with a soft brush and rinse thoroughly.
Also, run some espresso machine cleaner through your group head by engaging the pump for several seconds. This keeps internal passages clear and ensures consistent water flow and temperature.
Descaling Your Machine
Every month or so, depending on your water hardness, you should descale your machine. Mineral buildup from water reduces efficiency and can damage your boiler. Use a commercial espresso machine descaler, following the manufacturer’s instructions exactly. This usually involves running the descaling solution through the group head and steam wand for several minutes, then flushing with fresh water until the smell is completely gone.
Making Milk-Based Drinks With Your Casabrews Machine
Once you’ve mastered basic espresso, you might want to explore cappuccinos, lattes, and macchiatos. These drinks require frothed or steamed milk, which your Casabrews machine can produce perfectly.
Steaming Milk Like a Professional
Insert your steam wand into a pitcher of cold milk, positioning the tip just below the surface. Engage the steam function and listen for a gentle hissing sound. This is the sound of milk being incorporated and heated simultaneously.
As the milk warms, gradually lower the pitcher so the wand tip goes deeper into the milk. This creates more turbulence and better foam development. Stop steaming when the pitcher becomes too hot to hold comfortably—around 150 to 155 degrees Fahrenheit is ideal.
The best microfoam is smooth, glossy, and pourable, not thick and bubbly. Practice this technique repeatedly, and you’ll develop a feel for the right temperature and pressure.
Storing Your Coffee for Maximum Freshness
Even if you nail every aspect of brewing technique, stale beans will sabotage your efforts. Store your coffee beans in an airtight container away from light, heat, and moisture. Many coffee lovers use opaque glass jars with rubber seals for this purpose.
Avoid storing beans in the refrigerator or freezer. Temperature fluctuations cause condensation, which introduces moisture that degrades the beans. Room temperature in a dark cupboard is ideal.
Buy only what you’ll use within four weeks. Espresso beans are at their peak between two and four weeks after roasting, so plan your purchases accordingly.
Advanced Tips for Consistent Excellence
Once you’ve mastered the basics, these advanced techniques will elevate your game even further.
Pre-Infusion Understanding
Pre-infusion is the initial phase where water contacts the coffee grounds at low pressure before the main extraction pressure kicks in. This allows the grounds to expand and absorb water evenly. Some Casabrews models have adjustable pre-infusion settings. Experimenting with these can produce noticeably smoother, more balanced shots.
