I recently was given an all grain recipe for an interesting-sounding AG scotch ale. Since I don't have the gear for all-grain yet, I read up on converting recipes and thought I had a handle on it. The recommendations I saw were .6 lbs DME to each pound of base malt.
To be sure I didn't mess up my math, I entered the all grain recipe in BeerAlchemy, then created a DME Extract version. I kept an eye on the estimated OG and made sure it was the same on the two recipes. Since the recipe was given to me as percentages, I aimed to keep the percentages the same; this may have been a mistake, I now realize.
So the grain bill I was given was:
SG: 1.068
FG: 1.016
IBUs: 26
82.4% 2 Row - 11.5 lb
12.6% Crystal 40 − 1 lb 12 oz
4.2% Melanoidin Malt - 9.3 oz
0.4% Carafa II - .9 oz
0.2% Peated Malt - .5 oz
Mash at 155°F for 60 minutes, with a 90 minute boil.
My converted recipe, targeting a 5.5 gallon batch:
7lb 10oz Light DME
1 lb 2.6 oz Crystal 40
6.2 oz Melanoidin
0.6 oz Carafa II
0.2 oz Peated Malt
Steeped grains at ~160°F, did a partial boil of 3.5 gallons for 90 minutes and had enough boiled water to top off to 5.5 gallons.
The two volumes of water were combined in carboy, then the carboy was agitated for five minutes to mix and oxygenate. Then I pulled a sample and my hydrometer read 1.057.
The beer itself is fermenting merrily, but I'm wondering what I missed that my OG would be off by 11 points. Any thoughts would be appreciated.
To be sure I didn't mess up my math, I entered the all grain recipe in BeerAlchemy, then created a DME Extract version. I kept an eye on the estimated OG and made sure it was the same on the two recipes. Since the recipe was given to me as percentages, I aimed to keep the percentages the same; this may have been a mistake, I now realize.
So the grain bill I was given was:
SG: 1.068
FG: 1.016
IBUs: 26
82.4% 2 Row - 11.5 lb
12.6% Crystal 40 − 1 lb 12 oz
4.2% Melanoidin Malt - 9.3 oz
0.4% Carafa II - .9 oz
0.2% Peated Malt - .5 oz
Mash at 155°F for 60 minutes, with a 90 minute boil.
My converted recipe, targeting a 5.5 gallon batch:
7lb 10oz Light DME
1 lb 2.6 oz Crystal 40
6.2 oz Melanoidin
0.6 oz Carafa II
0.2 oz Peated Malt
Steeped grains at ~160°F, did a partial boil of 3.5 gallons for 90 minutes and had enough boiled water to top off to 5.5 gallons.
The two volumes of water were combined in carboy, then the carboy was agitated for five minutes to mix and oxygenate. Then I pulled a sample and my hydrometer read 1.057.
The beer itself is fermenting merrily, but I'm wondering what I missed that my OG would be off by 11 points. Any thoughts would be appreciated.