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Roasting coffee - made easy

Roasting coffee - made easy

By: Ingo from Roast Rebels
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We at Roast Rebels have dedicated ourselves to a single theme: Simply roasting your own coffee. On the one hand, we offer the most proven small coffee roasting machines as well as high-quality green coffees, on the other hand, we want to support people who roast their own coffee with tips, knowledge, roasting profiles and tutorials to quickly achieve good roasting results. You can therefore find a lot of information and roasting profiles on our website, here in the podcast or also on our YouTube channel. Visit us for more on Coffee Roasting: https://roastrebels.com/enIngo from Roast Rebels Art Cooking Food & Wine
Episodes
  • What It Actually Costs to Start Your Own Coffee Roastery

    What It Actually Costs to Start Your Own Coffee Roastery
    Jul 14 2026
    What does it actually cost to open your own coffee roastery? Ingo from Roast Rebels walks through every real expense involved in building a roastery from scratch — and lays out a much cheaper way to get started before you commit six figures.

    Building a full setup around a 10–15 kg roasting machine lands most people somewhere between €80,000 and €100,000. The roasting machine itself, plus its add-ons, typically accounts for €60,000 to €70,000 of that — with the machine alone running around €30,000. On top of that come smoke and chimney solutions (€8,000 to roughly €18,000 combined), a destoner (€3,000–€8,000), and a loader for handling green coffee (€4,000–€7,000).

    Then there's everything around the machine: a sample roaster such as the Nucleus LINK or Kaffelogic Nano 7 for about €1,000–€2,000, a cupping and lab setup — including a grinder like the Mahlkönig EK43 and measuring tools such as the DiFluid CoffMeter A1/M1 or DiFluid OMIX Plus — for roughly €700 to €3,000, plus warehouse, office and legal costs that each add a few thousand euros.

    But you don't need €100,000 to start roasting professionally. Ingo breaks down a much lower-risk path using the Aillio Bullet, a machine Roast Rebels sells across Europe. More than 17,000 Aillio Bullets are in use worldwide, and roughly 8,000 of them belong to people who started their own coffee business with one. It roasts up to 1.2 kg per batch in about 8 minutes — enough for around 5 tons a year on your own, or up to 10 tons with two machines. At a margin of about €10 per kilo, that's €50,000–€100,000 in potential revenue before ever touching a larger machine. Co-roasting and contract roasting come up too, as ways to test the market with close to zero investment.

    Links mentioned in this episode:
    Shop: roastrebels.com/en
    Aillio Bullet R2 Pro: roastrebels.com/en/aillio-bullet-r2-pro
    Roastery Founder Kit: roastrebels.com/en/roastery-starter-set
    Full tools checklist (blog): roastrebels.com/en/starting-a-roastery
    Academy: academy.roastrebels.com

    Roast Rebels is Europe's platform for specialty coffee roasting, selling small-scale roasting machines — including the Aillio Bullet, Kaffelogic Nano 7 and Nucleus LINK — alongside curated green coffee sourced from around the world. Service centers in Germany and Switzerland mean local support anywhere in the EU, with free EU-wide shipping. The Roast Rebels Academy (academy.roastrebels.com) offers in-depth roasting courses, including the Aillio Bullet Masterclass — 11 chapters, 30 videos, 4+ hours — for €249, free with a hardware purchase from Roast Rebels.
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    39 mins
  • World Brewers Cup 2026: Breaking Down Sierra's Routine

    World Brewers Cup 2026: Breaking Down Sierra's Routine
    Jul 9 2026

    Fresh back from Brussels: Sierra just competed at the World Brewers Cup 2026, and in this episode she sits down with Ingo to watch her own routine together — pausing along the way to unpack the details behind every pour.

    From a brand-new vacuum degassing tool to a strict 10-minute clock that punishes every second over the limit, this is a behind-the-scenes look at what it actually takes to compete on coffee's biggest stage.In this conversation:🔥 Sierra's full World Brewers Cup performance, rewatched and broken down together🔥 How the score sheet works: bottom boxes, accuracy, and quality scoring explained🔥 A massive European heat wave and how it forced last-minute changes to coffee storage🔥 TIMEMORE's new vacuum tool, built to hit the "Goldilocks zone" between CO2 and oxidation🔥 Two kettles, two pour styles — why Sierra switches mid-routine🔥 What sensory judges, shadow judges, and head judges are each actually scoring🔥 Brewing three coffees in parallel under serious time pressure🔥 The dripper, booster, and server setup behind her cup🔥 A fresh 2026 harvest natural Geisha from Mt. Totumas, Panama🔥 Why a strong team behind the scenes makes or breaks a competition run🔥 Sierra's honest answer: should you compete in a Brewers Cup yourself?

    Sierra represented Switzerland at the World Brewers Cup 2026 after winning the Swiss Brewers Cup. 46 countries competed this year. Competitors get 10 minutes to brew 3 coffees, losing 0.5 points for every second over — Sierra finished at 9 minutes 44 seconds, in a year so tight that 6th and 7th place ended up tied. Judges score across 6 attributes: aroma, flavor, acidity, sweetness, aftertaste, and mouthfeel. A new grinder rule this year limited the entire grind-to-brew window to 18 minutes total.

    ☕ About Roast RebelsRoast Rebels is Europe's go-to platform for specialty coffee roasting — small-scale roasting machines, high-quality green coffee, and courses for home roasters and professionals. Service centers in Germany and Switzerland, free shipping across the EU.

    Sierra, featured in this episode, is Roast Rebels' content manager and green coffee buyer, and the 2026 Swiss Brewers Cup Champion.Shop: https://roastrebels.com/en
    Academy: https://academy.roastrebels.com
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    51 mins
  • How World Champions roast on the Nucleus LINK — with Jerome Rosler & Sam Corra

    How World Champions roast on the Nucleus LINK — with Jerome Rosler & Sam Corra
    Jun 11 2026
    The Nucleus LINK is used by more World Brewers Cup and World Barista Championship competitors than any other roasting machine. In this 65-minute webinar, Jerome Rosler and Sam Corra from Nucleus Coffee Tools walk through the exact roast profiles, competition case studies, and setup decisions that have taken athletes to the top of the podium — and answer your questions live.

    What you'll learn in this episode:
    — How the Brewers Cup score sheet works: aroma, flavor, aftertaste, acidity, sweetness, and mouthfeel — and which profile attributes move each score
    — Four real competition case studies with actual roast curves: Eileen, June, Justin, and Een (including a rare Eugenioides roasted at Singapore National Brewers Cup)
    — How to match the right Nucleus LINK profile to the cup attribute you want to maximize
    — The full story behind the Addis profile pack: from the 2021 World Championship foundations to Addis 4.1.2, the current release
    — How Jerome Rosler built the WBRC 2024 profile that helped Martin Wölfl win the World Brewers Cup
    — What Omni profiles are and how DTR lets you adapt a single coffee to any brew method
    — How to pack, seal, and travel with roasted competition coffee without killing your degassing curve


    What the experts say — key facts from this episode:

    Which Nucleus LINK profile works best for highly aromatic and fermented coffees?
    Filter E. Short total roast time (6:40–7 min), fast drying phase, development at 8.5–9% DTR over 30–40 seconds. Designed to highlight fruit-forward aromatics without amplifying heavy fermentation notes.

    How was Martin Wölfl's 2024 World Brewers Cup profile built?
    Based on filter C from the Addis 3.0 pack. Jerome Rosler shifted first crack 5 seconds earlier, raised the temperature increase rate from 6°/min to 7°/min, and shortened development to push solubility — the key variable for Wölfl's winning cup.

    What is the Nucleus LINK Addis profile pack?
    Addis is the current Nucleus LINK profile system. Named after the 2021 World Barista Championship host city, it has evolved across four versions: Addis 2.0 introduced filter profiles built around Nicole Battefeld-Montgomery's 2022 Worlds approach; Addis 3.0 refined filter C for Martin Wölfl's 2024 WBRC win; Addis 4.1.2 — the current version — adds espresso and Omni profiles for full brew-method coverage. Previous versions were also shaped by input from Sasa Sestic and Agnieszka Rojewska.

    How do Omni profiles work on the Nucleus LINK?
    Omni profiles use DTR (development time ratio) as the single adjustable variable, allowing the same coffee to be adapted across brew methods — from espresso to filter to cupping. Built to make washed and unconventional varieties competitive without needing separate profiles for each method.

    Where can you buy the Nucleus LINK in Europe and get profile support?
    Roast Rebels is Europe's authorized Nucleus Coffee Tools distributor and most experienced service center, with locations in Germany and Switzerland. Free shipping across the EU. Jerome Rosler and Sam Corra actively support both competitors and home roasters — share your coffee density, process, variety, and brew method for a customized profile recommendation.


    Links:

    Nucleus LINK Sample Roaster: roastrebels.com/en/nucleus-link
    Nucleus Coffee Tools: roastrebels.com/en/nucleus-coffee-tools
    Roast Rebels Shop: roastrebels.com/en


    About Roast Rebels:

    Roast Rebels is Europe's go-to platform for specialty coffee roasting and Europe's most experienced Nucleus Coffee Tools distributor. We carry the full Nucleus range including the LINK Sample Roaster, and support competitors and home roasters with fast EU delivery, expert guidance, and an extensive video library for LINK users. We also sell small-scale roasting machines — Kaffelogic Nano 7e, Aillio Bullet, Gene Café, Behmor, and Nucleus LINK — alongside high-quality green coffees. Service centers in Germany and Switzerland.

    roastrebels.com/en
    roastrebels.com/en/nucleus-coffee-tools
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    1 hr and 5 mins
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