Batch size is 7L at 1.100 but there is 180g each of roasted barley and chocolate malt cold steeped for 48 hours in 5x their weight of water. This results in 1.5L of black stuff which is added at the end of the boil and doesn't add any gravity. This means that the rest of the recipe is for the equivalent of 5.5L at 1.127 (i.e. 127*5.5/7=100) so we're aiming for a boil size of 10L at 1.070, which will have a long boil and get down to 5.5L before adding the black stuff to bring back to 7L.
{"RecipeId":107453,"RecipeTypeId":10,"OriginalRecipeId":102969,"UnitType":"m","IbuFormula":"t","CreatedBy":110612,"Name":"SKA Imperial Stout","Description":"Batch size is 7L at 1.100 but there is 180g each of roasted barley and chocolate malt cold steeped for 48 hours in 5x their weight of water. This results in 1.5L of black stuff which is added at the end of the boil and doesn\u0027t add any gravity. This means that the rest of the recipe is for the equivalent of 5.5L at 1.127 (i.e. 127*5.5/7=100) so we\u0027re aiming for a boil size of 10L at 1.070, which will have a long boil and get down to 5.5L before adding the black stuff to bring back to 7L.","ImageUrlRoot":null,"StyleId":"20C","StyleName":"Imperial Stout","BatchSize":7,"BoilSize":10,"BoilTime":60,"Efficiency":0.87,"DateCreated":"\/Date(1676733131113)\/","BrewSessionCount":0,"MostRecentBrewSession":null,"Og":1.0997582918704481,"Fg":1.0189540754553852,"Srm":66.300199618275315,"Ibu":58.782259044404057,"BgGu":0.58924684797873383,"Abv":10.423743917543119,"Calories":349,"AverageRating":0,"TastingNoteCount":0,"Fermentables":[{"Per":"43","Amt":"1.35","Ppg":"32","L":"2","Use":"Mash","Id":"577484","IngId":"126","Name":"Pale 2-Row - UK","CustomName":"","Rank":"2"},{"Per":"25","Amt":"0.8","Ppg":"38","L":"3","Use":"Mash","Id":"577485","IngId":"15","Name":"Maris Otter Pale - UK","CustomName":"","Rank":"4"},{"Per":"13","Amt":"0.4","Ppg":"34","L":"60","Use":"Mash","Id":"577486","IngId":"518","Name":"Crystal 60L - UK","CustomName":"","Rank":"6"},{"Per":"4","Amt":"0.12","Ppg":"35","L":"4","Use":"Mash","Id":"577487","IngId":"589","Name":"Vienna - UK","CustomName":"","Rank":"8"},{"Per":"1","Amt":"0.035","Ppg":"33","L":"2","Use":"Mash","Id":"577488","IngId":"580","Name":"Rolled Oats - US","CustomName":"","Rank":"10"},{"Per":"1","Amt":"0.035","Ppg":"35","L":"2","Use":"Mash","Id":"577490","IngId":"96","Name":"Flaked Wheat - US","CustomName":"","Rank":"12"},{"Per":"2","Amt":"0.075","Ppg":"32","L":"2","Use":"Mash","Id":"577489","IngId":"78","Name":"Flaked Barley - US","CustomName":"","Rank":"14"},{"Per":"6","Amt":"0.18","Ppg":"0","L":"550","Use":"Steep","Id":"577491","IngId":"579","Name":"Roasted Barley - UK","CustomName":"","Rank":"16"},{"Per":"6","Amt":"0.18","Ppg":"0","L":"425","Use":"Steep","Id":"577492","IngId":"507","Name":"Chocolate - UK","CustomName":"","Rank":"18"}],"Hops":[{"Amt":"20","Type":"Pellet","Use":"Boil","Min":"60","Day":"0","AA":"11.9","Ibu":"55.1683640554614","Id":"595638","IngId":"18","Name":"Magnum ","CustomName":"","Rank":"1"},{"Amt":"10","Type":"Pellet","Use":"Boil","Min":"10","Day":"0","AA":"4.3","Ibu":"3.6138949889427","Id":"595639","IngId":"11","Name":"Fuggles","CustomName":"","Rank":"2"}],"Yeasts":[{"Atten":"0.81","Id":"159951","IngId":"253","Name":"Fermentis Safale US-05","CustomName":"","Rank":"1"}],"Others":[{"Amt":"175","Unit":"ml","Use":"Secondary","Id":"104797","IngId":"6783","Name":"Cold brewed coffee (20g coffee per 200ml water)","CustomName":"","Rank":"1"}],"MashSteps":[],"Steps":[{"Id":"180304","Rank":"1","Text":"Fermentation at 19C - 0.5C"},{"Id":"180305","Rank":"2","Text":"Cold brew coffee (25ml/L) and 3% vanilla extract (2ml/L)"},{"Id":"180306","Rank":"3","Text":"Note that the quantity of pale malt is higher than normal due to lower ppg of this sack."}]}