Primitive mini-mash for converting oatmeal

[Jdslep]

Hi HBT,

I am an extract brewer for now, but I want to make an oatmeal stout. There are extract recipes that use up to 1lb. flaked oatmeal without any conversion/mash, but there are also many who think this is a bad idea. Just in case, I considering a primitive mash by including ~2lbs. 2-row in a 45 minute steep instead of just my roasted barley, chocolate malt, and rolled oats. After the mash, I can do a poor man's sparge with a few cups of heated water.

Do I really need to convert the 1lb. oatmeal in this stout? Will this primitive steep/mash achieve any conversion? And what kind of efficiency should I use to predict OG? Thanks.

malt & fermentables
% LB OZ MALT OR FERMENTABLE PPG °L
43% 3 0 Muntons Light DME 44 5
29% 2 0 American 2-row Pale 37 1
14% 1 0 Flaked Oats 33 2
7% 0 8 Roasted Barley - 550L 34 550
7% 0 8 Chocolate Malt 28 345
Batch size: 4.0 gallons
Original Gravity
1.054 / 13.3° Plato
Final Gravity
1.013 / 3.3° Plato
Color
39° SRM / 77° EBC
(Black)
Mash Efficiency
60%
hops
USE TIME OZ VARIETY FORM AA
boil 60 mins 2.0 East Kent Goldings pellet 4.5
Boil: 2.5 avg gallons for 60 minutes

 

[Jdslep]

From looking around, it seems this is just no-sparge BIAB if I steep for 50 minutes at 150 then slowly raise the temp to 165 at mashout. People get fine efficiencies, and I'm going to give it a go. Advice still welcome about the oatmeal, of course.

 

[Chamuco]

Yes, you should mash the oats with the other grains. Welcome to partial-mash!