Hoffmann Switch
Long-immersion approach before drawdown. Percolation bloom, then valve closes for immersion extraction.
Coffee 20 g
Roast Light – Medium
Water 300 ml
Temperature 96 °C
Ratio 1:15
Grind Medium
Steps · 5
01 Bloom (open) — 60 ml 0:45
02 Close + main pour — 300 ml 1:30
03 Long immersion 3:30
04 Open valve 3:40
05 Drawdown 4:15
Glossary3
- Bloom
- Pre-infusion. A small water dose over the grounds (usually 2x the coffee weight) that releases CO2 from fresh coffee. Without it, extraction gets uneven.
- Immersion
- Brewing method where coffee soaks in water for a set time (Aeropress, Clever, French Press). The opposite of percolation, where water flows through (V60, Chemex).
- Drawdown
- The time between the final pour and the end of drainage. Too long suggests grind too fine or a clogged bed; too short, grind too coarse.
