Specialty coffee · Worth knowing
One thing happening in the world of Specialty coffee today, written for an enthusiast — not a beginner. Skip celebrity gossip. Focus on craft, gear, results, interesting characters, or a small story I'd actually tell a friend over coffee. Quality over quantity.
← See today's latestAnaerobic fermentation's high-wire act, micro-roasting's precision edge
Anaerobic Fermentation
Sealed tanks unlock wild, polarizing flavors.
Anaerobic fermentation locks freshly picked cherries in oxygen-free tanks where lactic acid bacteria take over, shifting the microbiology completely and pushing flavor compounds deep into the bean [Quelle: Roastworthy]. Producers run fermentation 24 to 120 hours with precise temperature and pH control; the carbon dioxide buildup and pressure inside the tank create those signature strawberry candy, cinnamon, and tropical fruit notes—rounder, creamier cups with syrupy body that washed processing never touches. The method, pioneered competitively around 2015 by Colombian Diego Bermúdez, borrowed from winemaking's carbonic maceration playbook.
Well-executed lots taste electric and clean; poor ones collapse into vinegar funk.
Micro-Roasting Precision
Five-pound batches demand second-by-second tuning.
Micro-roasting—working in 5–25 lb lots instead of commercial 500+ lb runs—flips the roasting calculus entirely: each batch gets custom heat curves tailored to that specific lot's density, moisture, and origin character rather than one standardized time-temperature curve [Quelle: Paddle and Brew]. Light roasts preserve floral, fruity, and bright acidity; medium roasts build sweetness while keeping origin voice alive; dark roasts shift dominance to roast-derived character. Precision roasting uses sample batches and airflow adjustments to honor what processing and terroir built, with specialty lots typically scoring 85+ on the SCA scale after professional Q Grader cupping.
Processing method shapes the cup more than origin or roast alone.
Processing Method Mastery
How cherries become coffee matters most.
Natural processing dries whole cherries for fruity, heavy-bodied cups; washed processing removes all fruit for cleaner, brighter acidity; honey processing leaves some mucilage attached for balanced sweetness [Quelle: Paddle and Brew]. Co-fermentation goes deeper—introducing specific fruits, yeasts, or botanicals into the fermentation tank alongside cherries builds flavor from within the bean through natural microbial processes, not sprayed oils like flavored coffee. Each method fundamentally reshapes which microbes dominate and which flavor compounds survive into the roasted bean.
Roasters chasing repeatable complexity now layer processing methods intentionally.
Anaerobic Fermentation in Coffee: Does It Make Better Beans?16 hours ago ... Cooler tanks mean gentler, more controlled reactions. Warm regions have to move fast or risk the whole batch tipping into rot. Lactic Acid, Carbonic Maceration, ...roastworthy.coffee