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Writer's pictureAlpha Barry

10 Common Coffee Brewing Mistakes and How to Fix Them

Updated: Dec 19, 2024


A cup of coffee with heart-shaped latte art sits beside a small bowl of coffee beans and a spoon on a light wooden surface, creating a cozy coffee scene.

1. Using Stale Coffee Beans

Mistake: Using coffee beans that have been sitting for weeks or months results in dull, flat flavors.Fix: Buy freshly roasted coffee and check the roast date on the bag. Use beans within 2 weeks of roasting and store them in an airtight container away from light and moisture.


2. Incorrect Coffee Grind Size

Mistake: Using the wrong grind size for your brewing method leads to over-extraction (bitter) or under-extraction (sour).Fix: Match the grind size to the method:

  • Coarse: French press, cold brew

  • Medium: Drip coffee, pour-over

  • Fine: Espresso or AeroPress

Invest in a burr grinder for consistency.


3. Using the Wrong Coffee-to-Water Ratio

Mistake: Too much or too little coffee results in weak or overpowering brews.Fix: Follow the Golden Ratio: 1 gram of coffee for every 15–17 grams of water. Use a kitchen scale for precision. Adjust the ratio based on preference.


4. Ignoring Water Quality

Mistake: Using tap water with chlorine or hard minerals affects the flavor of your coffee.Fix: Use filtered or bottled water for clean, balanced extraction. Avoid distilled water, as it lacks minerals that enhance flavor.


5. Brewing at the Wrong Temperature

Mistake: Water that’s too hot causes bitterness, while lukewarm water produces flat, weak coffee.Fix: Heat water to the optimal temperature of 195°F–205°F. If you don’t have a thermometer, let boiling water sit for 30 seconds before brewing.



A cozy breakfast setup features a mug of coffee with cat illustrations, accompanied by a golden croissant and fresh greenery on a rustic wooden tray.

6. Not Blooming Coffee Grounds

Mistake: Skipping the blooming step (pre-wetting grounds) can lead to uneven extraction, especially in pour-over methods.Fix: Pour a small amount of hot water over the coffee grounds (twice their weight), wait 30 seconds, and let the gas escape. Then continue brewing.


7. Using Dirty Coffee Equipment

Mistake: Residue buildup from old coffee oils and minerals creates rancid flavors.Fix: Clean your coffee maker, grinder, and equipment regularly with warm, soapy water or specialized descaling solutions. Rinse thoroughly to avoid soap residue.


8. Letting Coffee Sit Too Long

Mistake: Allowing brewed coffee to sit on a hot plate or in a French press causes it to over-extract and taste burnt.Fix: Transfer coffee to a thermal carafe immediately after brewing to maintain flavor without further heating.


9. Using Pre-Ground Coffee

Mistake: Pre-ground coffee loses flavor quickly as it’s exposed to air, light, and moisture.Fix: Grind your coffee just before brewing to preserve its aroma and oils. Store whole beans properly and grind based on your method.


10. Rushing the Brewing Process

Mistake: Cutting corners on brew time results in incomplete extraction and underwhelming coffee.Fix: Be patient and follow brew times for each method:

  • French Press: 4 minutes

  • Pour-Over: 3–4 minutes

  • Espresso: 25–30 seconds

  • Cold Brew: 12–24 hours


Final Thoughts

Avoiding these common coffee brewing mistakes can elevate your coffee game and deliver consistently flavorful cups. Focus on freshness, proper grind size, water quality, and clean equipment for the perfect brew every time.


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