MODULE 05 · 8 MIN
Barley, Other Cereals and Grain Whisky
Barley is central to Scotch because it supplies enzymes that convert grain starch into fermentable sugar. Single Malt Scotch Whisky uses only malted barley as its cereal. Grain whisky may include wheat, maize or other cereals alongside some malted barley to support conversion.
Cereal choice affects yield, texture and flavour potential, but the final character also depends on fermentation, distillation strength and maturation. Grain whisky should not be dismissed as neutral filler: well-matured examples can show delicate cereal, fruit, vanilla and waxy notes.
Key ideas
Single Malt uses malted barley only as its cereal.
Grain Scotch may use several cereals.
Raw material is one influence among several.
Glossary
- Enzyme
- A biological catalyst that helps convert starch into sugar.
- Grain whisky
- Whisky made at one distillery that may use cereals beyond malted barley.
Three-question self-check
Pause before moving on.
1. Can you explain: Single Malt uses malted barley only as its cereal.
Single Malt uses malted barley only as its cereal.
2. Can you connect: Grain Scotch may use several cereals.
Grain Scotch may use several cereals.
3. Can you define “Enzyme” in your own words?
Raw material is one influence among several.
Sources & further reading
- SWA — How Scotch Whisky is madeScotch Whisky Association
- The Scotch Whisky Regulations 2009UK Legislation
Last reviewed: 2026-08-09