Södermalm Roast Notes

A small batch specialty coffee journal

About the Lab

Welcome. We document small-batch roasting experiments, extraction science, and green bean sourcing notes from East Africa and Central America. Focused on light Nordic roast profiles and clean pour-over extractions.

Latest Entries

Ethiopia Yirgacheffe Chelbesa — Anaerobic Fermentation

Detailed breakdown of development time ratios (DTR) for anaerobic lots. Balancing floral jasmine aromatics with complex malic acidity.

Light Nordic Anaerobic Ethiopia
Water Chemistry: Calcium vs. Magnesium Ratios

Why adjusting GH/KH buffer levels using custom mineral concentrates fundamentally alters sweetness perception in light roasts.

Water Science Extraction