MODULE 06 · 7 MIN
Milling and the Grist
Dried malt is milled into grist, commonly separated conceptually into husk, grits and flour. The aim is not the finest possible powder: the mill setting must expose starch while preserving enough husk structure for efficient drainage in the mash tun.
Too much flour can compact the grain bed and slow drainage; pieces that are too coarse can reduce extraction. Distilleries monitor the grist ratio because repeatable physical preparation supports repeatable fermentation and spirit character.
Key ideas
Grist balances access to starch with drainage.
Finer is not automatically better.
Consistency begins before fermentation.
Glossary
- Grist
- Milled malt prepared for mashing.
- Mash tun
- The vessel in which grist and hot water are mixed.
Three-question self-check
Pause before moving on.
1. Can you explain: Grist balances access to starch with drainage.
Grist balances access to starch with drainage.
2. Can you connect: Finer is not automatically better.
Finer is not automatically better.
3. Can you define “Grist” in your own words?
Consistency begins before fermentation.
Sources & further reading
- SWA — How Scotch Whisky is madeScotch Whisky Association
Last reviewed: 2026-08-09