https://www.greatfermentations.com/schwarztastic-schwarzbier-recipe/
Mash at 152F for 60 minutes. After lautering and sparging, Proceed with a 90 minute boil, accounting for addition losses for the 90 minute boil. Add the first hop addition with 60 minutes left in the boil, and continue following the boil schedule. .
Chill and pitch yeast, fermenting for two weeks.
A diacetyl rest at 60F for two days near the end of primary fermentation is highly recommended.
Lager at 34F for 4-6 weeks before serving.