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Classic Double Decoction Octoberfest Lager

Method: All Grain
Style: Festbier
Boil Time: 60 min
Batch Size: 16 gallons (fermentor volume)
Pre Boil Size: 19.71 gallons
Post Boil Size: 18 gallons
Pre Boil Gravity: 1.051 (recipe based estimate)
Post Boil Gravity: 1.056 (recipe based estimate)
Efficiency: 75% (brew house)
Source: Daniel Dorst
Hop Utilization: 97%
Calories: 183 calories (Per 12oz)
Carbs: 15.3 g (Per 12oz)

Created: Sunday October 12th 2025

Original Gravity:

1.056

Final Gravity:

1.009

ABV (standard):

6.1%

IBU (tinseth):

19.3

SRM (morey):

5.2

Mash pH

5.4

Cost $

158.34

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Fermentables

Amount	Fermentable	Cost	PPG	°L	Bill %
19 lb	Weyermann - Pilsner19 lb Pilsner	$ 1.32 / lb $ 25.08	36	1.5	58.5%
9 lb	Weyermann - Munich Type I9 lb Munich Type I	$ 2.25 / lb $ 20.25	38	6	27.7%
4 lb	Weyermann - Vienna Malt4 lb Vienna Malt	$ 3.25 / lb $ 13.00	37	3.5	12.3%
0.50 lb	Weyermann - Carafoam0.5 lb Carafoam		34.5	2.2	1.5%
32.50 lbs / $ 58.33

Hops

Amount	Variety	Cost	Type	AA	Use	Time	IBU	Bill %
4.50 oz	Yakima Valley Hops - Hallertau (Mittelfruh)4.5 oz Hallertau (Mittelfruh) Hops	$ 0.81 / oz $ 3.65	Pellet	3.6	Boil	60 min	18.5	81.8%
1 oz	Yakima Valley Hops - Hallertau (Mittelfruh)1 oz Hallertau (Mittelfruh) Hops		Pellet	3.6	Boil	5 min	0.82	18.2%
5.50 oz / $ 3.65

Show Summary View

Amount	Variety	Cost	IBU	Bill %
5.50 oz	Yakima Valley Hops - Hallertau (Mittelfruh) (Pellet)	$ 0.81 / oz $ 4.45	19.32	100%
5.50 oz / $ 4.45

Mash Guidelines

Amount	Description	Type	Start Temp	Target Temp	Time
14 gal	Dough In	Strike	155 °F	145 °F	60 min
	Decoction 1: 4.3 gal	Decoction	145 °F	158 °F	15 min
	Decoction 2: 4.3 gal	Decoction	158 °F	170 °F	20 min
10 gal	Sparge Out	Sparge	168 °F	168 °F	15 min
Starting Mash Thickness: 1.75 qt/lb Starting Grain Temp: 65 °F

Other Ingredients

Amount	Name	Type	Use	Time
4 g	Chalk	Water Agt	Mash	1 hr.
13 g	Calcium Chloride (dihydrate)	Water Agt	Mash	1 hr.
12 g	Epsom Salt	Water Agt	Mash	1 hr.
10.58 ml	Lactic acid	Water Agt	Mash	1 hr.
1.52 g	Lactic acid	Water Agt	Sparge	1 hr.

Yeast

Fermentis - Saflager - German Lager Yeast W-34/70

Amount:	132 Grams	Cost:	$ 0.73 / g $ 96.36
Attenuation (avg):	83%	Flocculation:	High
Optimum Temp:	48 - 72 °F	Starter:	Yes
Fermentation Temp:	52 °F	Pitch Rate:	1.5 (M cells / ml / ° P) 1254 B cells required

$ 96.36 Yeast Pitch Rate and Starter Calculator

Priming

Method: co2 Amount: 10.93 psi Temp: 38 °F CO₂ Level: 2.47 Volumes

Target Water Profile

Munich (decarbonated)

Ca⁺²	Mg⁺²	Na⁺	Cl^-	SO₄^-2	HCO₃^-
40	20	4	75	52	29
Mash Chemistry and Brewing Water Calculator

Notes

Color attributions due to 2 decoctions in mash process.

Decoction Process:

1st Decoction: Pull 4.3 gallons from mash tun of 1 part liquid to 2 part grain. Boil for 15 minutes and return to mash and recirculate. Temperature of mash should increase from 145F to 158F.

2nd Decoction: Pull 4.3 gallons from mash tun of 1 part liquid to 2 part grain. Boil for 20 minutes and return to mash and recirculate. Temperature of mash should increase from 158F to 170F.

Sparge out as you normally would.

Recipe Photos

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Public: Yup, Shared
Last Updated: 2025-10-12 18:25 UTC

System Default

Recipe costs can be adjusted by changing the batch size. They won't be saved but will give you an idea of costs if your final yield was different.

Cost for

Gallons

Cost by

Final Yield

	Cost $	Cost %
Fermentables	$
Steeping Grains (Extract Only)	$
Hops	$
Yeast	$
Other	$
Cost Per Barrel	$ 0.00
Cost Per Pint	$ 0.00
Total Cost	$ 0.00

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