North_of_60
Well-Known Member
I've made several Oatmeal Stouts using grocery store oatmeal and never had a problem with hitting my projected OG. I spread the oatmeal out on a cookie sheet and roast it at 300 degrees for 15 minutes, add it to my mash and it's always been fine. I have read that all oatmeal is made by steaming the grains before rolling so they should mash when add with other malted grains.
Two beers ago I forgot it in the oven for 45 minutes and it got dark roasted. My OG was down exactly to what it would have been without the oatmeal. I had expected it to be low. The beer is drinkable but not great. I think the burnt oatmeal contributed to the not great.
I made another batch Friday using Quaker Old Fashioned Oatmeal. I have read on forums that some brewers just put the oatmeal in without roasting or preboiling so I thought I'd try that. No good, missed my OG by .011.
The only other difference is that I used Planet Pale Malt (Muntons), for my base malt on the last two.
Grain Bill:
10 lbs Base Malt
2 lbs Oatmeal
2 lbs Caramel 40
12 oz Chocolate Malt
8 oz Black Barley
I mashed for 90 minutes, started at 155 degrees was down to 153 after 90 minutes. I gave it an extra 30 minutes mash for the oatmeal.
Estimated OG 1.075
Actual OG 1.064
Estimated OG without Oatmeal 1.065
So, what is going on here?
Two beers ago I forgot it in the oven for 45 minutes and it got dark roasted. My OG was down exactly to what it would have been without the oatmeal. I had expected it to be low. The beer is drinkable but not great. I think the burnt oatmeal contributed to the not great.
I made another batch Friday using Quaker Old Fashioned Oatmeal. I have read on forums that some brewers just put the oatmeal in without roasting or preboiling so I thought I'd try that. No good, missed my OG by .011.
The only other difference is that I used Planet Pale Malt (Muntons), for my base malt on the last two.
Grain Bill:
10 lbs Base Malt
2 lbs Oatmeal
2 lbs Caramel 40
12 oz Chocolate Malt
8 oz Black Barley
I mashed for 90 minutes, started at 155 degrees was down to 153 after 90 minutes. I gave it an extra 30 minutes mash for the oatmeal.
Estimated OG 1.075
Actual OG 1.064
Estimated OG without Oatmeal 1.065
So, what is going on here?