https://blog.eckraus.com/munich-dunkel-lager-recipe-all-grain
The day before brewing, prepare a 4 Liter yeast starter.
MASH NOTES:
- Mash grains in about 12.11 Liter of clean water at 50 C for 30 minutes.
- Remove 1/3 of the mash and raise to 70 C for 20 minutes.
- Bring it to a boil for 20 minutes.
- Return the decoction to the main mash vessel and raise temperature to 65 C.
- Remove 1/3 of the Shop Grain Mills mash and bring to a boil.
- Return it to the main mash and sparge with 75 C water to collect 26.49 Liter of wort.
BOIL NOTES
- Do a 90-minute boil, adding hops according to schedule.
- Remove kettle from heat and cool wort to 18 C.
- Aerate wort and pitch yeast.
FERMENTATION NOTES
- When fermentation activity begins, reduce temperature to 13 C.
- Ferment for 14 days, then transfer to secondary and ferment at 5 C for 3 weeks.