100% Brettanomyces IPA

Brett IPAWhat do you do if you have an abundance of hops to use up and wish to make something a little more interesting than a standard IPA?  Craft a 100% Brett. IPA of course.

This brew follows a basic IPA recipe but utilizes some acidulated malt which drops the PH slightly and helps the Brett. along during fermentation.  We loaded this brew up with generous additions of Centennial, Columbus, Chinook, and Ahtanum hops for their wonderful floral and citrus notes as well as some herbal and piney undertones.

We originally pitched only Brett. Brux. Trois but had poor initial fermentation even though we had made a pretty hefty starter so we added a vial of Brett. Claussenii and fermentation picked up noticeably.  We think this will turn out to be a happy accident as (if all goes well) the Brett. C. will contribute more fruity aromatics to compliment the dry-hopping while the more aggressive Brett. Brux. Trois should add a mellow tartness and some fruity funk.  All was tasting on point at the time of transfer to secondary.

100% Brettanomyces IPA Variant 01

Recipe Specifics

Batch Size (Gal): 5.5
Total Grain (Lbs): 13.25
Anticipated OG: 1.065
Anticipated SRM: 7.0
Anticipated IBU: 45.0
Brewhouse Efficiency: 75%
Wort Boil Time: 90 Minutes


75% – 10.0 Lbs. U.S. 2-Row Pale
07% – 1.0 Lbs. Carapils
07% – 1.0 Lbs. Acidulated Malt
05% – .75 Lbs. Crystal 40L
03% – .50 Lbs. Honey Malt


0.50 oz. Centennial (Pellet, 10.5% AA) @ 90 min.
0.20 0z. Columbus (Pellet, 15.0% AA) @ 60 min.
0.40 oz. Centennial (Pellet, 10.5% AA) @ 15 min.
0.50 0z. Columbus (Pellet, 15.0% AA) @ 10 min.
0.50 0z. Ahtanum (Pellet, 6.0% AA) @ 10 min.
0.25 oz. Centennial (Pellet, 10.5% AA) @ 05 min.
0.50 0z. Ahtanum (Pellet, 6.0% AA) @ 01 min.
0.50 oz. Chinook (Pellet, 12.0% AA) @ 01 min.
1.00 oz. Centennial (Pellet, 10.5% AA) @ 0 min.
0.50 0z. Ahtanum (Pellet, 6.0% AA) @ 0 min.
0.50 oz. Chinook (Pellet, 12.0% AA) @ 0 min.
1.00 oz. Chinook (Pellet, 12.0% AA) @ 5 days dry hop
1.00 oz. Centennial (Pellet, 10.5% AA) @ 5 days dry hop
0.50 0z. Columbus (Pellet, 15.0% AA) @ 5 days dry hop
0.50 0z. Ahtanum (Pellet, 6.0% AA) @ 5 days dry hop


1.00 Whirlfloc @ 15 min.
1.00 tsp Yeast Nutrient @ 15 min.


White Labs WLP644 Brettanomyces Bruxellensis Trois
White Labs WLP645 Brettanomyces Claussenii

Water Profile

1.00 tsp Calcium Chloride
1.00 tsp Gypsum

Mash Schedule

Single Infusion – 75 min @ 155F


All late hop additions of “Centennial” are a 60%/40% Centennial/Columbus blend from Fremont Brewing.

10.15.14 – Made a stir-plate 2L starter with 1 White Labs WLP644 vial.  Fed it for two weeks to build cell count but never saw much activity.

Brewed 10.29.14 with Gregory

10.29.14 – Chilled wort to 70F before pitching yeast starter.

11.03.14 –  After 5 days without much activity, we pitched a vial of White Labs WLP645 with temperature holding steady at 65-68F.

11.20.14 – Transferred to secondary fermentor after 17 day primary fermentation with noticeable uptick in activity after the addition of the Claussenii.

Currently planning to let it condition for 27 days with the addition of the dry hops 5 days before kegging.

12.12.14 – Added dry hop additions.

12.17.14 – Kegged IPA with additional dry hops and carbonated and tasted it shortly thereafter.

Tasting Notes

This beer did not turn out.  Unfortunately it presents extremely grassy vegetal notes and a bracing, unpleasant bitterness.  We’ve brewed 100% Brett. IPAs before, so in our troubleshooting we have ruled out the usual suspects (old or bad ingredients, missed targets, wrong fermentation temp., uncleanliness & poor sanitation).  We were initially convinced that is was due to the stalled primary fermentation, however, when we transferred the beer to secondary it was tasting fine.  We now believe we simply had too many hop additions and the dryness that Brett. imparts accentuated the apparent bitterness.  This is our best guess even though the beer only clocks in with approximately 45 IBUs and a ratio of 0.71 IBU/OG, which is fairly low on the range of the IPA scale.  Next time we’ll stick to a simpler hop profile.  If anyone can come up with something we didn’t think of, leave a comment!

Calculated OG: 1.066
Calculated FG: 1.012
Approx. ABV: 7.1%


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s