Parting the Fogg – Matt Pietrek, Planteray and the Public Record

Parting the Fogg - Matt Pietrek, Planteray and the Public Record article by the fat rum pirate

Parting the Fogg – Matt Pietrek, Planteray and the Public Record

The word “wonk” has a fairly straightforward meaning. The Oxford English Dictionary defines the word as “a person who takes an enthusiastic or excessive interest in the specialised details of a particular subject or policy”. Calling yourself a wonk tells the reader to expect hard, objective data free from marketing spin.

Over the past decade, Matt Pietrek has built his entire brand around that single word. It started with his Cocktail Wonk website, moved over to his Rum Wonk Substack, and now includes his publishing imprint Wonk Press. Alongside his 2022 reference book Modern Caribbean Rum, that branding has positioned him as the industry’s go to technical analyst and archive researcher.

When a writer builds that level of technical authority, their work shapes how consumers, bartenders, and regulators view production standards, labelling, and things such as Geographical Indications (GIs). Looking back at the Key Milestones of what has been published across those platforms by Matt, alongside public statements from the industry, makes for very interesting reading.

The Wonk Standard: Correcting the Industry

Much of Pietrek’s reputation was built through “Myth Busting” on Cocktail Wonk, where he regularly called out other drinks writers, authors, and rum brands for getting their facts wrong. Across articles such as Rum Has No Rules is Lazy Journalism, An Open Letter to Authors Writing About Rum, and Dark Rum: Setting the Record Straight, the site acted as a strict fact checker for the rum world. He made a lot of good points in these articles and definitely did debunk a few myths and non-truths.

Parting the Fogg - Matt Pietrek, Planteray and the Public Record article by the fat rum pirate

In his August 2016 article Rum is Made from Sugar; So are Bourbon, Vodka & Tequila, he took mainstream spirits writing to task:

“While purporting to educate and document rum’s recent rise in popularity, it actually does quite the opposite with inane, misleading passages…”

In his February 2021 piece Rethinking “White Rum”, he dismissed standard industry terms as “lazy, reductionist, and unhelpful”.

Later that year, in his 17 August 2021 article Navy Rum Strength isn’t 57%, Pietrek laid down a firm rule for brands regarding the historical strength of British Royal Navy rum:

“There is an aphorism: Repeat a lie often enough, and it becomes the truth. When it comes to rum promoting itself as ‘Navy Strength’ at a hearty 57% ABV, this couldn’t be truer. The simple fact of the matter is that Britain’s Royal Navy issued its rum at 54.5% ABV. To repeat: navy strength is 54.5% ABV. It’s that simple… Also: Labels that declare both ‘navy strength’ and ‘overproof’ are doubly wrong.”

In that same August 2021 article, to prove that Royal Navy rum was issued at 54.5 percent ABV, Pietrek pointed to the genuine historical Royal Navy rum flagons bottled by Elixir Distillers for Black Tot Last Consignment:

“Can we empirically verify that Royal Navy rum was issued at 54.5% ABV? Yes! There are two well known real world examples to draw from. The Black Tot Last Consignment rum is honest to goodness Royal Navy rum, stored in flagons for many years before being bottled by Elixir Spirits. Its strength: 54.3% ABV. The 0.2% discrepancy is negligible given that it was originally issued over 50 years ago.”

Having set that benchmark for technical and historical accuracy, it is only fair to look at Pietrek’s later work by those same rigorous rum standards.

Editorial Disclosures, Wonk Press and the Navy Rum Archives

Parting the Fogg: Matt Pietrek, Planteray, and the Public Record article by the fat rum pirate

On the Cocktail Wonk website, Pietrek maintains a permanent Editorial Standards page outlining his consultancy work and his 2019 appointment as Community Envoy for the West Indies Rum and Spirits Producers’ Association (WIRSPA). On the subject of brand relationships, the page states:

“I do not accept any compensation to endorse, promote or advocate for brands or their products… I have no ongoing financial relationships with any brands. My writing presents factual information about spirits, brands and distilleries.”

On 23 April 2023, the French spirits site Rhum Attitude published a two part interview in French with Alexandre Gabriel, the owner and master blender of Maison Ferrand and Planteray Rum (WIRD / Barbados: interview with Alexandre Gabriel 2/2). In an English translation of the published interview, Gabriel explained how Pietrek’s research into British Royal Navy rum and the private archives of former ED&F Man employee Michael Fogg came about:

“When Matt Pietrek retired from Microsoft and decided to devote himself to rum, I sponsored his research on Navy Rum. He wrote the first part thanks in part to some crazy archives that he managed to find. I bought them from this old man who had saved them from E&DF Man… When he met him, Matt called me and said he had all the contracts for a century, it was crazy… We are going to make this rum that we will call Mr Fogg, in homage to Michael Fogg who has since passed away, knowing that there would be a room in the Château de Roissac with all his archives, and a rum that will bear his name.”

In July 2024, Maison Ferrand released Planteray Mister Fogg Navy Rum, named after Michael Fogg. Despite Pietrek’s August 2021 statement that “navy strength is 54.5% ABV. It’s that simple”, Planteray Mister Fogg Navy Rum was bottled at 55.7 % ABV. On 5 January 2026, Pietrek published an article on Rum Wonk titled Parting the Fogg: Mister Fogg Navy Rum, explaining how historical conversion tables, Sikes hydrometers, and temperature variations justified the 55.7 % ABV strength of the Planteray bottling.

In 2025, Pietrek’s publishing imprint, Wonk Press, released the book The Rum Never Sets: 300 Years of Royal Navy and London Dock Rum, co authored by Matt Pietrek and Alexandre Gabriel. Near the start of the book, Pietrek sets out the focus of the text:

“Many words have been written regarding the rich history of cane spirits… the horrors of the Triangle Trade… Yet it’s only one part of a larger story of rum.”

Part One of the book covers Pietrek’s history of the naval rum ration, including the statement on pages 11 and 166 that the Royal Navy rum ration doubled in 1756, a claim that readers and naval historians reviewing the book have noted does not appear in Admiralty records. Part Two of the book is written by Alexandre Gabriel and sets out his “seven pillars of Navy rum”, matching the production blueprint of Planteray Mister Fogg Navy Rum.

Published Specifications and Later Corrections

Parting the Fogg: Matt Pietrek, Planteray, and the Public Record article by the fat rum pirate

A regular feature of both Cocktail Wonk and Rum Wonk has been the publication of deep dive breakdowns covering the blends, fermentation methods and stills behind commercial rum releases.

On 22 January 2018, Pietrek published an article titled Plantation O.F.T.D. Overproof: Behind the Scenes and Deeply Deconstructed. Using component specifications provided to him for the piece,

Pietrek wrote that the Barbados portion of the blend came from both West Indies Rum Distillery (WIRD) and Foursquare Rum Distillery, specifically listing a 13 year old aged Foursquare rum.

Three years later, after Foursquare Rum Distillery owner Richard Seale publicly challenged the claim, Pietrek added a note to the 2018 article:

“Update, March 2021: Plantation tells me that the current blend no longer contains Foursquare rums in it. Also, Mr. Seale disputes that 13 year aged Foursquare was used in the original O.F.T.D. blend. I have left the original component description provided to me for historical context below.”

Another piece appeared on 7 November 2023 in the Rum Wonk article A Revamped Rockley Still and Other WIRD News. Covering the restoration of a pot still at Maison Ferrand’s West Indies Rum Distillery in Barbados, the article’s subheading noted:

“The public unveiling of the recently reconditioned Rockley pot still from 1780, a new limited edition rum, and public tours of West Indies Rum Distillery…”

Prior to Maison Ferrand buying WIRD in 2017, historical records and the plaque mounted on the still at the distillery dated the pot still to “before 1891”, noting it was acquired by WIRD in 1936. In the November 2023 article, the 1780 date was published without any mention of the original “before 1891” plaque.

The Shifting Usefulness of Hydrometer Testing

Parting the Fogg: Matt Pietrek, Planteray, and the Public Record article by the fat rum pirate

The archive also shows a changing stance on Hydrometer Tests depending on which bottle is being discussed.

In March 2015, Pietrek pointed out the limits of specific gravity testing by writing:

“Up till now, work by Richard Seale and Johnny Drejer have measured sugar contents by indirect methods (specific gravity).”

Later that same year, in a December 2015 review of Ron Cartavio, Pietrek used his own hydrometer to check for added sugar, writing:

“My hydrometer test yielded similar results to what Johnny Drejer found for the Cartavio XO, i.e., roughly 29 grams of sugar per liter.”

By July 2016, in an article covering the launch of Plantation OFTD at Tales of the Cocktail (OMG! O.F.T.D. and Other Rummy Happenings at Tales of the Cocktail), Pietrek wrote:

“We got a good laugh when someone passed out a Rum Bingo sheet prior to the session, filled with terms like dosage, solera, caramel, and hydrometer.”

Eighteen months later, in his 22 January 2018 breakdown of Plantation OFTD, Pietrek used a digital hydrometer test as proof that the Maison Ferrand bottling had no added sugar:

“Echoing the ‘no dosage’ message is Martin Cate, who’s measured the actual ABV with his fancy Anton Parr hydrometer. His measured ABV is effectively identical to the stated ABV on the label, indicating no sugar present, assuming the label ABV is accurate.”

In the comment section of his 5 January 2026 article defending the 55.7 percent ABV strength of Planteray Mister Fogg Navy Rum, a reader pointed out that Black Tot’s Mitch Wilson had tested genuine historical Royal Navy rum flagons (the same flagons Pietrek cited as proof in August 2021) with an Anton Paar Snap 41 digital hydrometer and recorded an average strength of 54.5 percent ABV. On 11 January 2026, Pietrek questioned the reliability of the Anton Paar reading without full lab testing:

“Mitch Wilson (Black Tot) did an interesting video testing rum from the flagons with an Anton Parr Snap 41, which is influenced by obscuration, if any. His measurements (on average) were fairly close to 54.5 ABV. But without a lab analysis of those spirits, we don’t know what else, if anything, is in those flagons.”

This approach to density testing sits alongside Pietrek’s wider coverage of post distillation sweetening. In his 28 December 2019 interview Alexandre Gabriel: On the Record, Pietrek raised the subject of added sugar by asking Gabriel:

“What is something you think people don’t understand about you and Ferrand’s mission? Is there a misperception about you? For example, some people have said that you just add sugar to rum to fool people and pass off bad rum as better than it really is.”

Gabriel replied in the interview:

“Very good dosage is a very expensive thing to do. It’s much cheaper to not do dosage. If it were all about profit, we would do something different.”

The Planteray Baseline and the 2026 Schedule

Parting the Fogg: Matt Pietrek, Planteray, and the Public Record article by the fat rum pirate

Outside of direct product reviews, Maison Ferrand’s brands, co owned distilleries, and archive projects also show up regularly as the main examples inside general historical and scientific articles on Rum Wonk.

Throughout 2026, the publishing schedule on Rum Wonk ran through a clear sequence of technical and historical topics alongside Maison Ferrand’s commercial releases:

The “Food Fight” Framing and Geographical Indications

Parting the Fogg: Matt Pietrek, Planteray, and the Public Record article by the fat rum pirate

Over the last ten years, producers in Barbados and Jamaica have pushed for strict Geographical Indications requiring rum carrying their island’s name to be aged entirely at origin and bottled without added sugar. Maison Ferrand, which owns WIRD in Barbados and holds a one third stake in National Rums of Jamaica (NRJ), ships Caribbean rum to France for secondary ageing in Cognac casks and sweetens certain bottlings.

In his Cocktail Wonk guide Barbados Rum: What You Need to Know, Pietrek summed up the dispute between the island’s distilleries by noting WIRD’s position:

“Four of the island’s distilleries are fundamentally split regarding a proposed Barbados Rum geographical indication (GI). Mount Gay, Foursquare, and Saint Nicholas Abbey collectively authored a proposal which has the primary stumbling block of requiring maturation completely on the island. West Indies Rum Distillery has so far stood fast against the GI proposal, saying it doesn’t reflect the historical diversity of Barbados rum making.”

In July 2024, the Barbados High Court dismissed two legal challenges brought by WIRD against the Barbados Agricultural Development and Marketing Corporation (BADMC) and the Corporate Affairs and Intellectual Property Office regarding the Barbados GI process. Across his Rum Wonk articles, including his October 2024 piece on the Jamaica GI changes (Jamaica’s Rum GI Changes: Overview and Analysis),

Pietrek has repeatedly referred to the Barbados regulatory dispute as “the long running Barbados GI food fight”. When covering foreign ownership in Caribbean GI disputes, Pietrek has also regularly pointed out that GI backers Mount Gay and J. Wray & Nephew (Appleton Estate) are owned by European parent companies Rémy Cointreau and Campari Group, both of which age and bottle their Geographical Indication rums on their respective islands without added sugar.

In his 2022 book Modern Caribbean Rum, Pietrek also wrote about the classification system created by Luca Gargano of Velier, which groups rums by still type and single distillery origin while banning added sugar:

“The Gargano classification provides no insights on what a rum tastes like; instead, its categories identify rums made comparably… As the rum community works to elevate rum’s perception as a premium spirit, we all need to reevaluate and improve the obsolete classifications and terminology used for rum.”

In a March 2025 interview with the whisky site Dramface, Pietrek compared rum with regulated single country spirits like Scotch whisky and Cognac:

“Being a multi spirit ‘meta category’ like whisky or brandy means that rum isn’t confined to the fairly similar flavor profiles of a single country spirit like Scotch whisky or cognac.”

When individual Caribbean nations have tried to put single country rules in place similar to Scotch whisky or Cognac, Pietrek has often questioned the specific limits. In October 2024, Jamaican regulators upheld changes to the Jamaica Rum GI requiring on island ageing and capping barrels at 250 litres or less, following legal challenges from NRJ. On 11 October 2024, in the comments under his Rum Wonk article on the ruling (Jamaica’s Rum GI Changes: Overview and Analysis), Pietrek wrote:

“With that said, the question still remains: why restrict the use of many traditional casks? Sure, there are workaround if you want a finish, but what’s fundamentally not Jamaican about putting it into, say… a puncheon? Or an actual sherry butt, or a Madeira drum? A cynic might observe that a particular, well known Jamaican brand is considered by many to be more cask forward and less fermentation forward than other Jamaican brands.”

Alongside his GI coverage, Rum Wonk has published several pieces looking at how regional trade rules apply to sweetened or lower strength spirits. WIRD in Barbados is the contract producer of Bumbu The Original, a sweetened, banana flavoured spirit bottled at 35 percent ABV that cannot legally be sold as rum in the European Union or the United States.

On 25 June 2024, Pietrek published an article titled Is Bumbu Rum? It Depends…, looking at how CARICOM regional standards apply to the bottle, followed in August 2026 by How is Bumbu the #1 Selling Super Premium Rum? On 14 September 2026, he followed these with a piece on international spirit rules titled Rum Police: What the Old Monk and McDowell’s Ban Teaches Us.

Whether that catalogue reflects independent technical analysis or brand alignment is ultimately up to the reader to decide.