For 70 Years, Chicago Has Smoked Its Barbecue Behind Glass. No One Can Say Exactly Why.
On Chicago's South and West sides, the smoker has a glass door. The aquarium pit belongs to this city and almost no other, and its origin is a genuine mystery, tangled up in the Great Migration, a 1950s health crackdown, and a metal shop that never wrote it down.
Robert L. Adams gets to Honey 1 BBQ before the neighborhood wakes up. By 6 a.m. he has big oak logs burning down to coals, and soon he lays hot links and rib tips across the rack, 15 to 20 at a time, to cook low and slow until the smoke has worked all the way through. The smoker he cooks on is not the black steel barrel you picture in a Texas backyard. Its door is a pane of tempered glass, and through it a customer can watch the meat darken in the haze.
Chicagoans call it an aquarium smoker, and it belongs to this city and almost no other. Walk into a classic barbecue joint on the South or West side and the glass pit is usually right there behind the counter, rib tips and links glistening inside. For a food so tied to Texas pits and Carolina cinderblock, Chicago's signature smoker is a strange and specific thing. Stranger still, no one can tell you for certain how it got here.
There is a romantic version of the story. Legend holds that the aquarium smoker was invented after the Great Chicago Fire of 1871, a fireproof answer from a city that had watched itself burn. It is a good story. It is almost certainly not true. The real answer, as best anyone can reconstruct it, is less cinematic and more Chicago: a mix of cheap cuts, a health-code fight, and a metal shop that never bothered to write anything down.
What the Glass Actually Does
Start with the machine. Joe Pery, who has worked the aquarium smoker at Lem's Bar-B-Q on East 75th Street for more than 30 years, will tell you the glass is not the point. The point is the air. A traditional smoker asks the cook to rotate the wood and babysit the fire for hours. An aquarium pit instead pulls air through a vent and drafts the smoke up a long chimney and out through the roof, so heat and smoke wrap the meat evenly on their own.
"It tenderizes the meat and evenly cooks it," Pery said. "That's the best thing about an aquarium." The glass, then, does two jobs at once. It seals the chamber, and it turns the cook into a show. That second job is where the mystery starts.
The Migration That Built a Barbecue
Chicago barbecue begins with the Great Migration, the decades-long movement of Black Americans out of the Jim Crow South toward northern cities and northern work. They carried the pit tradition with them. They also carried rib tips, the knobby ends trimmed off a rack of spare ribs. Butchers used to throw the tips away, which made them cheap, which made them a staple for families arriving in a new city with little money.
What came out of those pits grew into a plate all its own. A Chicago barbecue order is rib tips and hot links, piled on fries under a slice of white bread and doused in a thin, tangy-sweet sauce. It is working-city food, built to be affordable and eaten with your hands, and it took root in corner storefronts on the South and West sides rather than in destination smokehouses.
Michael Gebert, who wrote "The Chicago Way: An Oral History of Chicago Dining" and made a 2012 documentary on the city's barbecue, has spent years chasing the rest of the story. He has theories. He does not have paperwork. One theory runs through the health department. In the early days, cooks on the South and West sides dug brick pits into the ground and smoked the way they had down South. Around the 1950s, city inspectors decided the sunken pits were dirty and unsafe and wanted something that could be taken apart and scrubbed.
Gebert is not convinced the old pits were ever dirty. "I don't think they're dirty," he said, "because I think if something sits in a fire for 12 hours a day, it's pretty damn sterile." Clean or not, the rule pushed cooks toward a pit with removable panels, and nothing signals clean like glass and shining stainless steel.
The Shop That Made the Pits
If the aquarium smoker has a birthplace, it is a metal shop on the Near West Side. By most accounts Avenue Metal, on West Ogden Avenue, was the first company in Chicago to build barbecue pits. Basil Brunetti opened it in the 1950s, and his son Jim Brunetti runs it now. The shop started as a chop shop and grew into a place that makes everything from Giordano's kitchen equipment to steel boxes for shipping coffins overseas. Barbecue pits were never the main business.
"If we did half a dozen pits a year, we did a lot," Jim Brunetti said. Ask him why his father put glass in the sides and the trail goes cold. "No. I never really asked him," he said. The shop did leave one strong clue. In 1981, Basil Brunetti built a custom aquarium pit on wheels for Leon Finney Sr., who ran Leon's Barbecue and helped define the city's barbecue culture. Finney wheeled that rolling glass pit out to ChicagoFest at Navy Pier, a smoker and a billboard in one.
The design points to the second theory: the glass wall is a display case. Gebert put it plainly. The pit shows off the meat "like displaying jewelry in a jewelry store." Adams at Honey 1 has believed exactly that his whole career. He keeps his smoker up front, where customers can see it the moment they reach the register. "Otherwise they think you might be boiling food or something in the back," he said.
The Names Behind the Glass
No place carries the tradition further than Lem's. Myles Lemons founded it in 1954 in Greater Grand Crossing and ran it with his brothers Bruce and James, all three born in Indianola, Mississippi, and all three drawn north to Chicago in 1948 to cook. When they opened a second location in a former ice cream shop in 1968, they started serving the rib tips that made them famous. James Lemons stayed behind the pit the longest and died in 2015 at 87. His daughters run the restaurant now, and in 2025 the James Beard Foundation named Lem's an American Classic, one of the country's most enduring restaurants.
Jim Brunetti figures Lem's has worn out eight to ten of his aquarium pits over the years, roughly one every eight or nine, because almost no one else runs a pit hard enough to burn through the lining. Honey 1 BBQ, in Bronzeville, is the younger sibling in this story and no less devoted to the form. Adams has cooked on aquarium smokers for 23 years, and the routine has not changed: oak, a small blaze, hot links and rib tips laid down by the handful, and slow heat until the smoke has done its work. "That's basically what I like, is cooking it slow, not rushing it," he said.
An Endangered Species
The worry is that the glass pit is running out of cooks. The list of aquarium joints that have closed is longer than the list still open. The original Leon's on 79th Street is gone. So is Barbara Ann's on South Cottage Grove. Opening a new place with one is harder than ever. A common 4-by-8-foot steel pit runs about $12,000 before a single rib goes on, and Gebert says city inspectors have never warmed to the design. "I think they're an endangered species," he said.
The bigger threat is succession. Manning a pit takes training and long hours, and the next generation does not always want it. Adams's grandson has worked at Honey 1 since he was seven and has no plans to take it over. Lem's owner Carmen Lemons says the family is working on a succession plan of its own. The people who love these pits know exactly what would be lost if the glass went dark.
For now the glass stays lit. Joe Pery still shovels charcoal at Lem's and swears by the way "the smoke all comes together at once." Adams still opens up before dawn and lays his links across the rack, happy in a way that has nothing to do with paperwork or theories. "I love what I'm doing, totally love what I'm doing," he said. "If I didn't, I would quit." The origin of the aquarium smoker may never be settled. What happens behind the glass every morning is not a mystery at all.
Sources
- Aquarium Smokers Are A Chicago Barbecue Mystery (Block Club Chicago, Aug. 31, 2026)
- Smoking on the South Side: Chicago Barbecue and the Aquarium Smoker (Southern Foodways Alliance)
- Lem's Bar-B-Q history (Wikipedia)
Images courtesy Block Club Chicago (photos by Colin Boyle and Charlie Kolodziej) and Honey 1 BBQ.