Brouwerij Bliksem “GROM Blackbeard” White Rum Barrel-Aged Imperial Stout

Name: GROM Blackbeard
Brewer:  Brouwerij Bliksem (Netherlands)
Style: Specialty Wood-Aged Beer (Base Style: Imperial Stout)
ABV: 13%
Review Year: 2022

Brouwerij Bliksem from the Netherlands brings us the bold and pirate-inspired stout, GROM Blackbeard (13% ABV). This beer has undergone the perfect amount of aging in white rum barrels, striking a harmonious balance between the beer itself and the barrel’s influence.

Backlog review from April 2022.


This beer is being evaluated as a Specialty Wood-Aged Beer (33B) with the Imperial Stout (20C) as the base style, in the context of the 2021 Beer Style Guidelines of the Beer Judge Certification Program (BJCP). The most current version can be found on the BJCP website.


An enticing aroma of black forest cake, intertwined with the alluring influence of rum-aged oak, greets your senses. Delicate hints of toasted coconut, coffee, and praline add complexity to the aroma, while the moderate notes of dark chocolate and alcohol create an enticing allure.

GROM Blackbeard reveals a deep brown hue that is reminiscent of a moonlit night. Its syrupy and opaque dark brown body draws you in, capturing your attention. It is topped with a thick brown head.

The flavor profile of this stout is a symphony of indulgence. Bitter dark chocolate and coffee take the spotlight, intertwining to create a luxurious combination of flavors. The presence of toasted coconut and roasted malt adds depth and complexity, while the sweet rum essence provides a delightful touch of sweetness. The finish of GROM Blackbeard is a testament to its craftsmanship as it lingers on the palate, allowing the flavors of rum, sugar, and dark roast malts to unfold gracefully. Each sip leaves a lasting impression, enticing you to savor the moment and relish in the full-bodied experience.

With a medium-full body, this Imperial Stout offers a substantial and satisfying mouthfeel. The carbonation level, ranging from medium to medium-low, adds a gentle effervescence that enhances the overall drinking experience.


Overall, GROM Blackbeard is a remarkable barrel-aged stout that combines flavors with finesse. Its flavorful and balanced nature makes it relatively easy to drink, despite the high ABV. An absolute sensory bomber, this beer showcases the full essence of barrel aging, delivering a truly memorable and enjoyable experience for stout enthusiasts.


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