7 Common Espresso Mistakes (and How to Avoid Them)

Brew Like a Barista – Anywhere You Go

Your espresso doesn’t taste like it does at the café? You’re not alone — and it’s not your beans’ fault.

Even with the best equipment like a Heypresso portable espresso machine, simple mistakes can sabotage your shot. Whether you’re brewing in your kitchen or making coffee on a camping trip, these common missteps could be holding your espresso back.

Here’s how to fix them — and start pulling rich, balanced, barista-worthy shots every time.

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☕ Mistake #1: Using Stale Coffee Beans

The Fix: Always check the roast date.

Espresso needs fresh beans for flavour, aroma, and crema. Beans that are weeks (or months) past roast date produce flat, bitter shots.

• Buy beans roasted within the last 2 weeks

• Store in an airtight container away from light and heat

• Avoid the fridge or freezer (they introduce moisture)

• Buy in small batches – only what you’ll use in 2–3 weeks

• Grind fresh just before brewing for the best results

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☕ Mistake #2: Using the Wrong Grind Size

The Fix: Adjust your grind to your espresso machine.

A grind that’s too coarse = sour, weak espresso
A grind that’s too fine = bitter, over-extracted espresso

Start with a grind the texture of table salt. Adjust from there:

• Sour or fast extraction? → Go finer

• Bitter or slow flow? → Go coarser

💡 Pro tip: Use a burr grinder for even grind size. Inconsistent grinds = uneven flavour.

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☕ Mistake #3: Skipping Machine Cleaning

The Fix: Clean daily, deep clean monthly.

Oils, coffee residue, and limescale all build up in your machine — especially if you’re using it daily. Dirty machines = bitter, off-tasting coffee.

• Rinse and wipe daily

• Clean portafilter and drip tray weekly

• Run a cleaning cycle (if your machine has one)

• Descale once a month if you use tap water

💡 Portable espresso makers should also be flushed with clean water after every use — especially if you’ve used milk.

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☕ Mistake #4: Poor Tamping Technique

The Fix: Tamp evenly with consistent pressure.

Uneven or light tamping causes water to flow unevenly through the coffee bed, leading to both under- and over-extraction in one cup.

Follow these steps:

1. Level the grounds in the portafilter

2. Hold the tamper like a doorknob

3. Press down evenly with about 30 lbs of pressure

4. Finish with a slight polish twist

💡 Use a bathroom scale to practise and learn what 30 lbs feels like.

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☕ Mistake #5: Not Preheating Your Equipment

The Fix: Warm up your machine and your cups.

Cold metal or porcelain cools espresso immediately, ruining crema and dulling flavour.

• Turn on your machine 15–20 mins before use

• Run a blank shot to preheat the group head and portafilter

• Fill your espresso cups with hot water and empty just before pouring

💡 Travelling? With your Heypresso, run hot water through the system before brewing your shot to warm up the internals.

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☕ Mistake #6: Using the Wrong Water

The Fix: Choose filtered water with balanced minerals.

Water makes up 98% of espresso, so bad water = bad coffee. Hard water creates scale and bitterness. Soft or distilled water lacks minerals, leading to flat, lifeless flavour.

Use:

• Filtered tap water with low chloride and balanced hardness

• Bottled water with low TDS (total dissolved solids) when travelling

• Avoid distilled and softened water unless you’re blending and remineralising

💡 Check out our full blog on “6 Types of Water for Espresso Machines” to learn more.

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☕ Mistake #7: Bad Milk Frothing

The Fix: Froth milk with the right temp, volume, and texture.

Incorrect milk frothing can ruin drinks like lattes and cappuccinos — even if your espresso is perfect.

To froth properly:

• Start with cold milk, fill only one-third of the pitcher

• Keep the steam wand just under the surface to create a whirlpool

• Aim for 65°C (150°F) – stop when the pitcher feels warm but not hot

• Tap the pitcher to remove bubbles and swirl before pouring

💡 Barista-style oat or almond milk froths better than regular non-dairy options.

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✨ Level Up Your Coffee Game – One Shot at a Time

By avoiding these seven mistakes, you can take your espresso from “meh” to “masterpiece” — no matter where you’re brewing. Whether you’re at home or brewing in the wild with your Heypresso, it’s the small steps that make the biggest difference.

📸 Got a top tip or brewing setup? Show us your shots on Instagram — tag @hey.presso and join our growing community of home and travel baristas.