Aeropress Filter: Paper vs Metal and More FAQs

If you’ve ever wondered why your Aeropress coffee tastes thin, bitter, or overly smooth—or why your coffee grounds explode when you add just a few tablespoons of water—you’re not alone. These are some of the most common issues Aeropress users face. From choosing the right filter to dialing in grind and water temperature, we answer the questions real coffee drinkers ask the most.

The short answer? Most people prefer the cleaner, richer taste of paper-filtered Aeropress coffee. Use a fine to medium-fine grind (like between drip and espresso), aim for a brew ratio that fits your taste, and keep your water between 74–80°C for optimal extraction. And yes, you can make great coffee without buying a new grinder.

Paper or Metal Filter for Aeropress?

Most coffee drinkers prefer the taste of coffee brewed through paper filters in the Aeropress. Metal filters allow more coffee particles and oils (fines and colloids) to pass through, resulting in a heavier, grittier cup similar to French press coffee. In tests with multiple coffee enthusiasts, the majority preferred the flavor of paper-filtered coffee.

As for the paper itself, modern white Aeropress filters are bleached without dioxins—a cancer-causing chemical once used in the 1980s. Brown filters, on the other hand, may release a cardboard-like taste and could contain questionable chemicals like tar. For best results, use the white filters that come with your Aeropress.

Why Does My Aeropress Coffee Taste Too Smooth or Weak?

If your Aeropress coffee feels thin or lacks strength, the issue could be one of three things:

• Grind too coarse: A finer grind (closer to espresso than drip) extracts more flavor. If using a blade grinder, run it for 20–30 seconds. For a burr grinder, aim for a setting between drip and espresso.
• Not enough coffee: Use the scoop that comes with your Aeropress to measure the correct dose.
• You prefer bitter coffee: Aeropress coffee is naturally smoother and less bitter. If you want a stronger or more intense cup, try using more coffee or less water.

Do I Need a Special Grinder for Aeropress?

No—you don’t need to buy an expensive burr grinder just for the Aeropress. Many standard blade grinders work fine if you adjust your technique. Try grinding for about 30 seconds with two scoops of coffee. The resulting fine grounds may clump due to static, so you might need a spoon to help remove them. Finer grinds may require a 20–30 second press time. Coarser grinds brew faster but result in a lighter cup.

How Should I Brew a Standard Americano with Aeropress?

We’ve tried making Americanos by brewing concentrated coffee and then diluting with hot water—but in blind tastings, testers consistently preferred the smoother result from our recommended method. Over-extracting with too much water leads to bitterness. Instead, follow the suggested brew method and then add hot water to taste afterward.

Why Use Water at 80°C Instead of Boiling?

We tested water temperatures extensively during the Aeropress’s development. Across coffee drinkers, from beginners to professionals, the consensus was clear: water between 74–80°C produces the best-tasting coffee. While hotter water can be used, it’s not necessary—and may over-extract bitter compounds.

Traditional brewing methods often suggest 91–93°C, but those methods lose heat quickly, especially at the bottom of the brew bed. In the Aeropress, all coffee grounds are evenly exposed to the same water temperature throughout brewing. Remember: the hottest coffee most people can comfortably drink is around 63°C.

What’s the Deal with the Stirring Spoon?

The included Aeropress stirring tool has a specially designed handle that prevents it from tearing the paper filter or scratching the brew chamber. While you can use any spoon, the official tool helps avoid damaging your equipment.

Where Can I Buy More Filters?

Every Aeropress comes with 350 paper filters—enough for several months of brewing. Replacement 350-filter packs are widely available from many retailers, including on Taobao.

Why Is It Hard to Press Down the Aeropress?

Difficulty pressing often comes from pushing too hard, too fast. Here’s a better method: Press the plunger down about 1 cm, then pause to let the compressed air inside help. Repeat this slow pressing until you hear air escape, indicating all the liquid has been filtered. Then finish pressing the coffee puck. If it’s still hard, your grind might be too fine—try shortening your grind time or adjusting to a coarser setting.

Why Does My Coffee Overflow When I Use Just a Few Tablespoons of Water?

This usually happens with very fresh coffee and water hotter than the recommended 80°C. Try using water at 80°C or even 85°C to prevent bubbling overflow. If you prefer hotter water and its added bitterness, reduce your water dose to 2 or 3 tablespoons per brew.

How Can I Heat Water to Exactly 80°C?

Here are a few reliable ways to hit the ideal brew temperature:

• Microwave Method: Measure your water, heat it in the microwave, and use a kitchen thermometer to find out how long it takes to reach your target temp. After calibration, you won’t need the thermometer again.
• Boil-and-Mix Method: Boil water, then mix in cool water to bring the total volume up by one third—for example, mix 1.5 cups of boiling water with enough cold water to make 2 cups total.
• Cooling-in-Cup Method: Pour boiling water into your (preferably cold) cup and let it sit for about a minute. This preheats the cup and cools the water slightly. Then pour the water into your Aeropress. You can verify temperature with a thermometer if desired.
• Hot Water System: If your home has an adjustable water heater set to 80°C, you’re all set for perfect Aeropress brewing. Some electric kettles also offer precise temperature control.

Frequently Asked Questions

Which filter gives better coffee in an Aeropress—paper or metal?

Most coffee drinkers prefer the cleaner, richer flavor produced by paper filters. Metal filters allow more fines and oils to pass through, resulting in a heavier, grittier cup similar to French press coffee. Tests show the majority of users opt for paper-filtered coffee for its smoother taste.

Why does my Aeropress coffee taste weak or thin?

Your coffee may taste weak due to a coarse grind, insufficient coffee dose, or personal taste preference for bitter coffee. Try a finer grind (between drip and espresso), ensure you're using the correct amount of coffee, or increase coffee or decrease water to intensify flavor.

Do I need a special grinder to make good Aeropress coffee?

No special grinder is required. Many blade grinders work well if you grind for around 30 seconds with two scoops. Burr grinders set between drip and espresso also work. Finer grinds may require longer pressing and can clump due to static.

What’s the best water temperature for Aeropress brewing?

The optimal water temperature range for Aeropress is 74–80°C. While you can brew with hotter water, most testers, including professionals, preferred the flavor profile within this range. Avoid using boiling water for the smoothest results.

Why is it difficult to press the plunger down?

Difficulty pressing is usually caused by pushing too hard or using a grind that’s too fine. Press slowly in stages, letting air help push the liquid. If it remains hard, try adjusting to a coarser grind or reducing your grind time.

Recommended FrontStreet Beans for Aeropress

For Aeropress brewing, try FrontStreet Strawberry Candy Espresso—a balanced blend with notes of rose, citrus, and berry, ideal for highlighting clarity and sweetness. Alternatively, FrontStreet PWN Golden Mandheling offers low-acid depth with spices, caramel, and chocolate notes for a heavier cup. Both work well across a range of grind sizes and brew ratios. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.