Oktoberfest Amber Lager
What's documented and what's guidance
The backbone of this recipe — 100% sorghum malt grist with gypsum, the mash methods, the enzyme discipline, the bitterness architecture with its tetra swap, the cool clean fermentation with a diacetyl rest — is the practice already documented across this site's brewing pages, assembled here into one recipe. The Oktoberfest steering (roast level, noble hop choice) is guidance consistent with our field experience that German recipes suit sorghum malt, marked where it appears. Nothing else is invented.
Oktoberfest Amber Lager
- Protocol
- GFB-R2
- Version
- Recipe v1
- Effective
- August 2026
A malt-forward amber lager in the Oktoberfest direction — the classic-styles thesis in a kettle. The backbone is documented practice; the Märzen steering (roast level, noble hops, bigger gravity) is stated guidance, chip-marked in the bill below.
Documented vs guidance: The grist, gypsum, enzyme discipline, bitterness architecture, and fermentation practice are documented; the style steering is guidance and marked as such. This exact recipe as printed has not been brewed and measured — and the documented practices were built at lighter gravity, so expect to mash bigger to hit Märzen strength.
Ingredient bill
| Ingredient | Amount | Basis |
|---|---|---|
| Sorghum malt, Vienna roast | 10 lb 100% sorghum grist is documented practice; the Vienna roast is the Märzen steering | Guidance |
| Gypsum | ~1 tsp in the grist Grist gypsum at ~0.2% | Documented |
| Rice hulls | 0.5 lb at mash-out | Documented |
| Bittering hops | Clean high-alpha (CTZ family), 60 min, ~9 IBU The documented architecture, halved for style | Documented |
| Character hops | Noble German (Hallertau family), 15 min, ~4 IBU Bard's brewed this style with Tettnang and Hallertau — Craig's recall; Sterling is the later flagship's documented character hop | Memory |
| Tetra hop extract | ~5 IBU, post-fermentation The 5-IBU foam rule | Documented |
| Yeast | Clean lager strain cold — or clean ale strain at 20.5°C Ale-cool with a diacetyl rest is documented; true lager is style guidance | Documented |
| Yeast nutrient (verified gluten-free) | Per supplier | Documented |
Stage before brew day
Pick your route
- Do
- Run the Reliable Mash at Homebrew Scale or Method 1 (Old Traditional Bard’s), scaled to the grist. Running both on a split and comparing the beers would be one of the most useful reports this site could receive.
- Add
- Per the chosen run sheet
- Advance when
- Wort collected at target gravity.
- Record
- Which route · Efficiency and gravity
Malt leads, hops serve
- Do
- Bittering charge at the start (~9 IBU). Nutrient per supplier. Noble character hops at 15 minutes (~4 IBU).
- Add
- Bittering hops at start
- Nutrient per supplier
- Noble hops at 15 min
- Advance when
- Knockout at target gravity.
- Record
- Charges and timings · Post-boil gravity
Clean and cool
- Do
- Pitch adequately and hold temperature. Watch gravity toward 5°P.
- Add
- None
- Advance when
- Gravity nears 5°P.
- Record
- Curve and temperature log
Diacetyl rest, then cold
- Do
- Raise to 22°C at about 5°P, hold to stable gravity and a clean check, then crash. Lager route: lager cold, three to four weeks.
- Add
- None
- Advance when
- Stable, clean, cold.
- Record
- Rest timing · Final gravity
Tetra and carbonate
- Do
- Dose tetra to ~5 IBU post-fermentation, carbonate, and judge it: did the malt actually taste like something?
- Add
- Tetra extract, ~5 IBU
- Advance when
- In the glass.
- Record
- What the malt character delivered — honestly
| Step | Action | Target | Add | Advance when |
|---|---|---|---|---|
| 1. Mash: more detail | Run the Reliable Mash at Homebrew Scale or Method 1 (Old Traditional Bard’s), scaled to the grist. Running both on a split and comparing the beers would be one of the most useful reports this site could receive. | the Reliable Mash — or Method 1 Per the chosen sheet |
| Wort collected at target gravity. |
| 2. Boil: more detail | Bittering charge at the start (~9 IBU). Nutrient per supplier. Noble character hops at 15 minutes (~4 IBU). | Boiling 60 min |
| Knockout at target gravity. |
| 3. Ferment: more detail | Pitch adequately and hold temperature. Watch gravity toward 5°P. | 20.5°C ale — or lager cold To ~5°P | None | Gravity nears 5°P. |
| 4. D-rest: more detail | Raise to 22°C at about 5°P, hold to stable gravity and a clean check, then crash. Lager route: lager cold, three to four weeks. | Raise to 22°C at ~5°P Until stable and clean | None | Stable, clean, cold. |
| 5. Finish: more detail | Dose tetra to ~5 IBU post-fermentation, carbonate, and judge it: did the malt actually taste like something? | Carbonated amber lager — |
| In the glass. |
Run each step with its checks and context
Use the run sheet during a routine mash. Use these expanded steps when setting up the process, training an operator, documenting a deviation, or diagnosing unexpected behavior.
Pick your route
Objective
Two documented routes: the Reliable Mash is reliable and dry; Old Traditional Bard’s runs maltose-leaning — arguably the better match for a malt-forward style, and an open research question either way.
Operating instruction
Run the Reliable Mash at Homebrew Scale or Method 1 (Old Traditional Bard’s), scaled to the grist. Running both on a split and comparing the beers would be one of the most useful reports this site could receive.
- Per the chosen run sheet
What good looks like
Wort collected at target gravity.
Watch for
No additional step-specific warning.
Record
Which route · Efficiency and gravity
Level 3 · Mechanism and evidence Mash Methods at Homebrew Scale
Malt leads, hops serve
Objective
Restrained kettle bitterness — the malt is the point of the style.
Operating instruction
Bittering charge at the start (~9 IBU). Nutrient per supplier. Noble character hops at 15 minutes (~4 IBU).
- Bittering hops at start
- Nutrient per supplier
- Noble hops at 15 min
What good looks like
Knockout at target gravity.
Watch for
No additional step-specific warning.
Record
Charges and timings · Post-boil gravity
Clean and cool
Objective
An Oktoberfest lives or dies on clean fermentation — no hop cover for a buttery lager. The ale route is not hypothetical: the Oktoberfest-style lager Bard’s brewed ran at ale temperatures.
Operating instruction
Pitch adequately and hold temperature. Watch gravity toward 5°P.
What good looks like
Gravity nears 5°P.
Watch for
No additional step-specific warning.
Record
Curve and temperature log
Diacetyl rest, then cold
Objective
The documented insurance against the one fault this style cannot hide.
Operating instruction
Raise to 22°C at about 5°P, hold to stable gravity and a clean check, then crash. Lager route: lager cold, three to four weeks.
What good looks like
Stable, clean, cold.
Watch for
No additional step-specific warning.
Record
Rest timing · Final gravity
Tetra and carbonate
Objective
Foam-positive bitterness closes the ledger at ~18 IBU.
Operating instruction
Dose tetra to ~5 IBU post-fermentation, carbonate, and judge it: did the malt actually taste like something?
- Tetra extract, ~5 IBU
What good looks like
In the glass.
Watch for
No additional step-specific warning.
Record
What the malt character delivered — honestly
The mash: pick your route
Two documented routes to the wort, both published in full:
- the Reliable Mash at Homebrew Scale — the standard: 190°F liquefaction, 145°F conversion, 180°F mash-out. Glucose-forward wort, reliably dry.
- Method 1: Old Traditional Bard's — the older route: low rest, boil, then fungal-alpha at 132°F for 100 minutes. Maltose-leaning wort — arguably the better match for a malt-forward style, and an open research question either way.
Running both routes on the same recipe and comparing the beers would be one of the most useful reports this site could receive.
Fermentation
Ferment clean and cool (ale strain at 20.5°C / 69°F, or lager cold per your strain), with a diacetyl rest when gravity nears terminal (the documented practice: at 5°P, raise to 22°C), then crash — the full fermentation discipline is here, including why this wort finishes drier than the gravity suggests. An Oktoberfest lives or dies on clean fermentation — there's no hop cover for a buttery lager. And the ale-strain route isn't hypothetical: the Oktoberfest-style lager Bard's brewed ran at ale temperatures (Craig's recall).
Why this beer, this way
This recipe is Stop Hiding Behind the Hops made drinkable: a style where the malt is the point, bitterness stays restrained (~18 IBU, five of them from foam-positive tetra), and the sorghum has to actually taste like something. If the malt foundation is weak, this beer will tell you. That's the point.
Report back
Gravity, fermentation curve, which mash route you ran, and what the malt character actually delivered — Research Asks and contact. A side-by-side of the two mash routes earns a page update with credit.
Related
- Mash Methods at Homebrew Scale
- Tavern Ale, Version A — the other recipe in the family
- Hops and Yeast for Sorghum Malt
- The Sugar Bible
Source and Validation Notes
The grist composition, gypsum use, enzyme discipline, bitterness architecture including the tetra swap, fermentation temperatures, and diacetyl-rest practice are the practices documented on this site's brewing-process pages, assembled here into one recipe. Style steering toward Märzen (roast level, noble hop selection, higher gravity) is editorial guidance and marked as such in the table. This exact recipe as printed has not been brewed and measured — brew it and report back.