What is the step-by-step brewing process for non-alcoholic beer?
Step 1 — Mashing: Crushed malted grain is mixed with hot water at 62–75°C for 60–90 minutes. Mash temperature is the first critical NA decision: 62–65°C favours beta-amylase, producing fermentable maltose. 72–75°C favours alpha-amylase, producing more unfermentable dextrins and less alcohol potential. Most NA brewers mash at 72–75°C to reduce potential alcohol before fermentation even begins.
Step 2 — Lautering: The liquid wort is separated from the spent grain via filtration through the grain bed (vorlauf) and sparge (rinsing). Standard process, no modification needed for NA production.
Step 3 — Boiling: Wort is boiled for 60–90 minutes. Hops are added for bittering (early addition) and aroma (late addition/flameout). Proteins are coagulated. No NA-specific modifications at this stage, though some producers reduce hop bitterness levels (lower IBU) to avoid harshness without alcohol's mouthfeel buffer.
Step 4 — Fermentation (critical NA modification): Wort is chilled and pitched with yeast. For NA production: either (a) controlled fermentation at very low temperature (0–2°C) with arrest by filtration at target ABV; (b) short-duration standard fermentation arrested by rapid chilling at 0.3–0.8% ABV; (c) standard fermentation to 2.5–5% ABV followed by dealcoholization. Each option has dramatically different flavour impacts.
Step 5 — Conditioning and packaging: The beer is conditioned cold (1–4°C) for 1–4 weeks. Carbonation is adjusted (forced CO2 or natural priming). Packaging in can or bottle with appropriate oxygen management — oxygen is the primary enemy of NA beer shelf life, producing cardboard/papery off-notes within days at room temperature.
| Step | Standard beer | NA beer modification |
|---|---|---|
| Mashing temperature | 65–68°C (fermentable) | 72–75°C (dextrin-rich, less fermentable) |
| Fermentation | Full attenuation (5–7% ABV) | Arrested/controlled (0.3–0.8%) OR dealcoholized |
| Hop rate | Standard IBU target | Often reduced (no alcohol buffer for bitterness) |
| Packaging | Standard oxygen management | Critical — oxygen extremely damaging to NA |
The zeroproof.one guide to non-alcoholic beer explains how the world's best NA breweries execute each step — and what to look for when evaluating quality on the shelf.