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Oisin Owl Irish Stout

Brewed: 02/16/2025   Kegged: 03/02/2025

In 2025, I wanted to concentrate a little more on my BJCP Goal, and my Roll-a-Style List.

Early in the year, I brewed Merida Scottish Ale, using harvested Irish Ale Yeast, and I wanted to continue that yeast with an Irish Ale.

I had 15C. Irish Extra Stout on the Roll-a-Style List and with St. Patrick's Day coming up, I thought that would be a great beer to have on tap for this holiday.

So, I pretended to roll a 12 


Which, of course corresponded to the 15C. Irish Extra Stout.

"A fuller-bodied black beer with a pronounced roasted flavor, often similar to coffee and dark chocolate with some malty complexity. The balance can range from moderately bittersweet to bitter, with the more balanced versions having up to moderate malty richness and the bitter versions being quite dry."
OisinStout.jpg
For this recipe, I looked at Brewing Classic Styles, I asked ChatGPT, and I looked at the American Homebrew Association's recipes (Paul's Irish Extra Stout).

I pretty much ignored all these and came up with my own recipe.  And this is it.

The name "Oisin Owl" came from the AI Generated post Pack o' Hooligans Stout.

Apparently, "Oisín" is an mythological Irish creature. I'm not sure how AI came up with the owl, but I decided it would make a good beer name for an Irish beer.


I was drinking this beer by St. Patrick's Day, and believe that I nailed the smooth rich roast flavor without overdoing any flavor in the beer. It is wonderful.

On untapped: Oisin Owl Irish Stout 

For more about this beer, see Sheppy's Blog: Oisin.


Oisin Owl Irish Stout --- Batch 1 (371)

Style Irish Extra Stout Batch Size 5.50 gal
Type All Grain Boil Size   6.60 gal
Brewhouse Efficiency   65.00   Boil Time   60 minutes

Recipe Characteristics

Recipe Gravity 1.055 SG Estimated FG 1.014 SG
Recipe Bitterness 40.3 IBUs (Rager) Alcohol by Volume 5.5 %
BU : GU   0.728        
Recipe Color 41.1 SRM
Color
   
Measured OG:   1.055    Measured FG:   1.013 
ADF:   75    Measured ABV:   5.6 

Ingredients

Ingredients
Amt Name Type # %/IBU Volume
8.03 gal Denver, Colorado Water 1 - -
6.00 g Calcium Chloride (Mash) Water Agent 2 - -
2.00 g Gypsum (Calcium Sulfate) (Mash) Water Agent 3 - -
9 lbs 8.0 oz Pale Malt, Maris Otter (3.0 SRM) Grain 4 74.5 % 0.74 gal
1 lbs 8.0 oz Barley, Flaked (1.7 SRM) Grain 5 11.8 % 0.12 gal
12.0 oz Roasted Barley (Simpsons) (550.0 SRM) Grain 6 5.9 % 0.06 gal
10.0 oz Chocolate Malt (450.0 SRM) Grain 7 4.9 % 0.05 gal
6.0 oz Crystal, Dark (Simpsons) (80.0 SRM) Grain 8 2.9 % 0.03 gal
0.500 oz Magnum [14.40 %] - First Wort 60.0 min Hop 9 32.5 IBUs -
0.500 oz Magnum [14.40 %] - Boil 15.0 min Hop 10 7.9 IBUs -
1.00 Items Whirlfloc Tablet (Boil 10.0 mins) Fining 11 - -
1.0 pkg Irish Ale (Wyeast Labs #1084) [124.21 ml] Yeast 12 - -

Mash Profile

Mash Steps
Name Description Step Temperature Step Time
Saccharification Add 32.14 qt of water at 159.1 F 152.0 F 45 min
Heat Heat to 158.0 F over 10 min 158.0 F 15 min
Mash Out Heat to 170.0 F over 7 min 170.0 F 10 min


If steeping, remove grains, and prepare to boil wort

Recipe Notes
A couple days before brew day, make 6 cup starter with 3 cups DME.
Combine brewing salts in the mash and sparge water. This should bring Denver water profile (as defined by BeerSmith) to
Ca=101,Mg=8,Na=21,SO4=88,Cl=119,HCO3=104
Boil wort adding ingredients as specified.
Cool to as close to 60 degrees as possible to pitch.
Ferment under 65 for a couple of days, then let heat up to about 70.
Total fermenation time 2 weeks.
Keg and force carbonate. Drink when ready

Brewing Record

Brew Date:   Strike Temp:  
Mash Temps:  
Pre-boil OG   (1.050 SG)   Pre-boil Vol   (6.60 gal)
Actual Mash Efficiency   Pitch Temp    
Fermentation            
Day 1: 
Day ... 
Day ... 

 
Brewing Notes:
01/31/2025 esheppy
Bought ingredients at Brew Hut along with malts for Mardi Blonde.
02/14/2025 esheppy
Hoping to brew this weekend. Need to get a starter made.
02/15/2025 esheppy
Made the starter from the yeast harvested from Merida (1/28). Should Brew tomorrow.
02/16/2025 esheppy
Prepared the water last night and set the timer to warm up water sometime early morning. Got started brewing around 6 am and got the mash done before church. Preboil low on both gravity and volume. Compensated with .5 lb DME and slightly longer boil. Chilled and pitched around 11:30. OG right at 1.055 after a little dilution. No Tilt on this batch.
02/17/2025 esheppy
Took off sometime before bedtime last night. Going strong right now.
02/20/2025 esheppy
Slowed down considerably. Still a bubble every once and awhile and the krausen is still there. The temp strip says 64ish. Not schedule to keg until the 2nd of March, but I may end up kegging next week sometime.
02/24/2025 esheppy
There is some remnants of krausen on top, but I think this is probably ready to keg. I do have an open keg, although it does need cleaning. So, I might get this kegged before the end of the week.
03/02/2025 esheppy
Kegged today. Gorgeous black beer. Sample tasted pretty smooth without too much roast. Really a pleasant tasting beer. A little dry in the finish. I measured 1.013 for the FG, which makes this a 5.6% ABV beer. Pretty much as designed. Harvested a whole quart of yeast for King Fergus.
03/06/2025 esheppy
Killed Decemberfest finally, so I could get this into kegerator. Will chill a day before hooking up gas.
03/07/2025 esheppy
Connected gas. Set at 23psi. Took another sample. Maybe a bit more roast than I remember from the kegging sample. Will drink a bunch on St. Patrick's Day weekend. Maybe quite a bit this weekend too.
03/13/2025 esheppy
Yummy. Rich roast but not overpowering. Smooth. Wonderful. Carbonation perfect. Bought some Guinness Extra today to do a comparison. Stay tuned to find out my impressions.
03/16/2025 esheppy
St Patrick's Day Eve. Comparing my beer with Guinness Extra. Honestly, Guinness tastes horrible next to mine. A touch of licorice and sharp (somewhat unpleasant) bitterness in G. Maybe a sour twang. Mine is much smoother and more balanced. Nicer roast and dark chocolate. Visually very close. Black with ruby highlights and gorgeous tan head. G is also more dry and doesn't have quite the mouth feel.
03/17/2025 esheppy
St. Patrick's Day drinking during work. I googled the Guinness date code (L4288GG003). If I'm understanding the code correctly, this was bottled on the 288th day of 2024 (10/15/2024). This means that the Guinness is 5 months old, which doesn't seem young, but also doesn't seem old enough to be bad. So, maybe this is what it should taste like? Mine is so much better!
03/25/2025 esheppy
Yeah ... looks like a stout; smells like a stout; tastes like a stout. Beautiful black beer. Coffee and dark chocolate roast. Medium - high body. Well balanced ... not too sweet and not too bitter. Fairly dry in the finish. Really enjoying this beer.
04/04/2025 esheppy
Yummy stout. Beautiful stout. Honestly better than most commercial stouts I've had. Not sure this will last much longer.
04/12/2025 esheppy
Yummy. More dark chocolate than coffee roast. Nice beer on a summer-like day while grilling chicken.
Comments:
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