Barrel-Aged Partner Particles
Trillium Brewing Company

Beer Geek Stats
From:
Trillium Brewing Company
 
Massachusetts, United States
Style:
American Imperial Stout
ABV:
14.8%
Score:
+5 ratings needed
Avg:
4.1 | pDev: 3.41%
Ratings:
5 | reviews: 2
Status:
Retired
Rated:
Nov 30, 2025
Added:
Dec 24, 2020
Wants:
  0
Gots:
  1
Collaboration with Equilibrium Brewery

Brewed with Mostra and Barrington coffee beans, Madagascar vanilla, and almond, Barrel-Aged Partner Particles presents a pitch black with glass-coating legs. Rich dark chocolate, bright roasted coffee, and creamy vanilla greet the palate upfront, leading the way for an underlying spiritous cognac note to warm up the end of each sip. Medium-bodied, with a well-structured oak presence and just a touch of sweetness, Barrel-Aged Partner Particles is a truly complex offering.
Recent ratings and reviews.
 
Rated: 4.17 by hopley from Massachusetts

Nov 30, 2025
 
Rated: 3.89 by vfgccp from New York

Jun 19, 2022
Photo of Damian
Reviewed by Damian from Massachusetts

4.21/5  rDev +2.7%
look: 4 | smell: 4.75 | taste: 4 | feel: 3.75 | overall: 4.25
Drank from a 500 ml bottle purchased at Trillium Brewing Company, Boston, MA
12/18/20
Served in a tulip

The oily, viscous, pitch black body was topped by a small, frothy, espresso colored crown that quickly dissolved. Tiny particles could be seen floating atop the surface of the liquid. There was a small, nickel sized dollop of froth too. No lacing however.

The aroma was outstanding. Rich chocolate notes seemed to dominate, even though the beer apparently contained none. Dark chocolate fudge definitely came to mind. Loads of high quality vanilla extract too. The bourbon-barrel notes were also quite prominent. Good dose of brown sugar sweetness as well. Unfortunately, I could not pick up any coffee or almond.

The flavor profile was significantly more boozy and astringent than the aroma. Roasted malts came through strong. Hint of caramel malt sweetness too. Big whiskey barrel presence. Quite woody and tannic. Vanilla was noticeable in the center. More boozy barrel notes on the back end and the finish. Woody tannins lingered after the swallow. Like in the nose, both the coffee and the almond were unfortunately undetectable. As the beer warmed, the barrel notes mellowed and the sweetness intensified.

The mouthfeel was creamy and slick but thinner bodied for a beer of this magnitude. The liquid contained a fairly aggressive effervescence that gave the liquid a lightness and a prickliness on the palate. After a few sips, the sugars in the beer left a sticky film on my lips. Later, the carbonation settled to a more appropriate level.

Barrel-Aged Partner Particles had a fantastic aroma, but unfortunately both the flavor and the mouthfeel came up a bit short. Of all the recent Trillium pastry stout releases, this was one of the more disappointing.
Mar 24, 2021
 
Rated: 3.98 by Nichols33 from Massachusetts

Feb 28, 2021
Photo of wtg29
Reviewed by wtg29 from North Carolina

4.23/5  rDev +3.2%
look: 4 | smell: 4 | taste: 4.5 | feel: 3.75 | overall: 4.25
Pours jet black with thin ring of head. Nose is bourbon, caramel, coffee. Taste follows with more bourbon, coffee, a subtle almond sweetness. Dry boozy finish, excellent mouthfeel.

May be the Equilibrium influence but overall great stout, not too thin or sweet, best I've had from Trillium in a bit
Jan 10, 2021