How to Roast 20 Coffee Bean Types at Home

Home roasters often wonder: Can you get quality results without complex roast curves? For most beginners using small electric roasters like the Apollo, the answer is yes—if you keep it simple. The key isn’t chasing perfect roast curves, but understanding how basic controls like temperature and time affect flavor.

The quickest answer: Set a maximum roast temperature, aim for 10–12 minutes total roast time, and roast 100g batches for best results. Higher heat (9th setting) and shorter time (around 10 minutes) highlights bright, clean flavors in high-quality beans. Lower heat and longer roast times help mellow inconsistent or lower-grade beans. Avoid comparing electric and gas roasters—they create fundamentally different flavor profiles.

Basic Approach: Don’t Chase Curves

Birdman , a seasoned home roaster, advises skipping overly complex roast curve adjustments. “Don’t think about playing with curves,” he says. “The home roaster’s job is to be easy and effective.” Instead, set a clear max temperature, manage roast duration, and let the machine do the rest. Comparing electric and gas roasters is pointless—each heats differently, producing unique flavor outcomes. Electric roasts tend to be cleaner and brighter, while gas can add deeper, smokier tones. It’s a matter of style, not superiority.

Adjust Heat and Time Based on Bean Quality

For higher-quality green coffee beans, Birdman recommends a high-heat, fast-roast method—for example, using the 9th power setting for around 10 minutes. This approach, typical of hot-air roasters, highlights delicate, high notes such as floral and fruity acidity. Going longer risks losing those early volatile aromas.

With lower-grade or uneven beans, use lower heat and extend roast time. The idea is to “grind down” inconsistencies and mellow harsh or earthy off-flavors through a slower roast. But if you’re selecting quality beans to begin with, a quick, high-heat roast can produce surprisingly vibrant and complex results—on par with many commercial machines.

How to Use the Apollo Home Roaster

The Apollo home roaster is user-friendly. Before loading beans, press the preheat button and wait for the automatic ready signal. Then load your green coffee, choose a power setting, and start. Each numbered setting corresponds to a roast time, and the machine stops automatically when done. Out-of-the-box factory settings yield evenly roasted beans with balanced flavor.

To explore more nuanced flavor layers, use a separate timer. Set the Apollo to any of the high-numbered settings—7, 8, or 9—and monitor the roast yourself. You can stop the roast manually by holding the power button or lifting the lid. Judging roast level by bean color and the first and second crack sounds is reliable. When roasting smaller amounts—like 50g—reduce the power to around the 6th setting to avoid scorching.

Birdman’s go-to roast time is around 10–12 minutes for approximately 100g of beans. That range gives enough time for development without over-roasting.

Roast Capacity and Evenness

The Apollo can handle up to 150g per batch, but Birdman suggests filling only 60%–80% of capacity—that’s about 90–120g—for the best roast uniformity. This guideline applies across most home and even some commercial roasters. Why? Because coffee bean origin affects bean size and density. For example, 150g of Ethiopian Yirgacheffe beans roast evenly, but the same load of large Guatemalan Elephant beans may not develop uniformly. Uneven roasting isn’t always bad—it can add complexity—but beginners benefit from aiming for consistency first.

The Apollo also includes an automatic smoke filtration system. This makes indoor roasting far more pleasant, eliminating harsh smoke and replacing it with a sweet, milky aroma. Other brands, such as Taiwan’s Little Train roaster, offer similar features. For home setups, smoke filtration is a major quality-of-life upgrade.

Visuals: Roasted Beans from 20 Origins

Below are images of beans roasted on the Apollo, showing both light and dark roasts. These are presented in a “show-off” format—but remember, pretty beans don’t always taste better, and ugly ones can surprise you. The photos are for reference only.

• French Guadeloupe Vanibon Estate (Blue Butterfly)
• Madagascar
• Mandheling Peaberry
• Mexico Cassandra
• Uganda Organic
• New Caledonia Kuanki Estate (Rayoy)
• Yirgacheffe
• India Emperor Washed Robusta
• Vietnam Arabica
• Australia Hilltop (semi-washed)
• Panama Hacienda Humoldt
• Peru (organic)
• Indonesia Kopi Luwak (Civet)
• Bolivia Typica
• Guatemala 23 Mesh Elephant Bean
• Colombia Hyland
• Costa Rica Wolf Estate Honey Process
• Guatemala Antigua
• Hawaii Kona Peaberry
• Kenya AA

As noted, attractive roast appearance doesn’t guarantee great flavor—and some great-tasting roasts look imperfect. Take the visuals as illustrative, not prescriptive.

Frequently Asked Questions

What’s the best roast time for home roasting?

For most home electric roasters like the Apollo, a total roast time of around 10–12 minutes works well, especially for 100g batches. Adjust based on bean origin and desired flavor profile.

Should I use high or low heat for high-quality beans?

Birdman recommends using a high-heat setting (such as the 9th level) with a short roast time (approx. 10 minutes) for high-quality beans to preserve floral and fruity notes. Avoid long roasts that dull early aromas.

Can I compare electric and gas roasters directly?

No. They use completely different heating methods, and thus develop distinct flavor profiles. Electric roasts are typically cleaner and brighter, while gas roasts may have deeper, sometimes smokier characteristics. It’s not a matter of better or worse, but different styles.

How full should my roaster be for best results?

Fill the drum to about 60%–80% capacity—around 90–120g for a 150g-max machine. Overfilling leads to uneven roasting, especially with beans of different sizes or densities like Ethiopian vs Guatemalan beans.

What’s the advantage of the Apollo’s smoke filtration system?

The Apollo includes an automatic smoke filter, which greatly reduces indoor roasting smoke. This makes the process much more pleasant and avoids strong odors. Similar systems are found on other home roasters like Taiwan’s Little Train.

Do pretty roasted beans mean better flavor?

Not necessarily. Some beans may look less attractive but taste excellent, and vice versa. Use visual cues as a rough guide, not a quality guarantee.

Recommended FrontStreet Beans for Home Roasting Inspiration

Try FrontStreet Coffee’s Ethiopia Yirgacheffe for bright floral and citrus notes, Panama Hacienda Humoldt for honey-process sweetness and stone fruit, and Guatemala Antigua for classic chocolate and spice complexity—all representative of the origins featured in the 20-bean roast guide. These beans respond well to both light and medium roast profiles, making them ideal for home experimentation. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.