Lotteria Burnt Beef Burger Review — Chef Collab [Korean Food] - KOREAN FOOD REVIEW & RECIPE

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Korean fast food chains have been tapping celebrity chefs for limited-edition collaborations, and Lotteria’s latest is one of the most ambitious yet. The Burnt Beef Burger is a nationwide limited-quantity release, created in partnership with Chef Lee Chan-yang — known as the “Crooked Genius” from the hit Netflix cooking competition show Black and White. Featuring a squid ink “burnt cheese bun,” pure beef patty, 4-hour caramelized onions, and a side of brown butter oil, this premium burger pushes Lotteria into fine-dining territory. Their previous chef collab, the Napoli Matfia Mozzarella Burger, was already unconventional — this one doubles down. Let’s see if it delivers.

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📋 At a Glance

Product: Burnt Beef Burger
Brand: Lotteria × Chef Lee Chan-yang (from Netflix’s Black and White)
Price: 7,900 won single (approx. $5.90 USD) / 10,400 won combo
Availability: Nationwide, limited quantity
Key components: Squid ink burnt cheese bun, pure beef patty, 4-hour caramelized onions, bacon, cheddar slice, brown butter oil (separate packet)
Verdict: ★4.0 — The burger itself has excellent fundamentals and rich flavor. The brown butter oil is polarizing — taste it first and add to preference.

Price and Key Features

Like the previous Napoli Matfia Mozzarella Burger, this release has a strikingly unusual look. True to the chef’s “Crooked Genius” persona, the ingredients themselves are classic — beef, bacon, cheese, onions — but the combination is anything but ordinary. The central concept is “pushing flavors to the edge of burnt,” drawing out maximum depth from each component. As Lotteria’s second chef collaboration, it bridges fine-dining sensibility with fast-food accessibility.

Lotteria Burnt Beef Burger premium burger

The Brown Butter Oil and Limited Availability

The standout feature is the separately packaged brown butter oil. Since no commercially available version exists in Korea, Lotteria appears to have developed it in-house. The burger is labeled as limited quantity, though the Mozzarella Burger eventually became a permanent menu item — so consumer response could determine this one’s fate too. I ordered the combo set.

What’s Inside the Burnt Beef Burger

Opening the paper burger pack reveals a simple sleeve wrapper. The overall look is familiar yet unfamiliar — somewhere between a Burger King Guinness Burger and something entirely new.

Seoul Yongsan-gu Sookdae-ipgu station location

The Squid Ink Burnt Cheese Bun

The bun is colored jet black with squid ink and topped with baked cheese — a blend of cheddar and mozzarella. It looks slightly dry on the surface but is surprisingly soft. The deliberate “charred” appearance ties into the overall burnt concept, showing real attention to thematic detail. The cheese-topped bun approach carries over from the previous Mozzarella Burger, though this version takes the roasting further.

Patty and Internal Build

Cutting it in half reveals the full stack: the squid ink bun with dual-cheese topping, followed by 4-hour caramelized onions, crispy bacon, a cheddar slice, a pure beef patty, and sauce. This burger notably uses a dedicated beef patty rather than Lotteria’s standard mixed patty — a meaningful upgrade.

With crisp-fried onions, layers of cheese, and a proper sauce underneath, the flavor potential looks serious even before adding the brown butter oil.

Surprising charm of the Burnt Beef Burger

Taste Test: The Burger vs. The Oil

I started with the first half plain — no brown butter oil. The difference from standard Lotteria burgers was immediately clear. The pure beef patty delivers rich meaty flavor, and the grilled cheese plus caramelized onions wrap around each bite with a deeply savory sweetness.

Burger Fundamentals and Sauce

Add the crispy bacon and it’s a noticeably different experience from Lotteria’s usual lineup — reminiscent of something you’d get at Burger King, actually. The base is remarkably well-built, and the sauce stays restrained enough to let the ingredients speak. There’s even a hint of char-grilled flavor coming through.

The sauce tastes less like standard BBQ and more like a subtle bacon jam — gently sweet without being cloying, designed to temper the richness of the other components rather than dominate.

The Brown Butter Oil: Love It or Leave It

Then came the brown butter oil. Brown butter (beurre noisette) isn’t widely known in Korea, and even I don’t have much experience with it. The flavor was genuinely startling — somewhere between butterscotch and hazelnut, but in an oily, somewhat heavy form.

Traditional brown butter should carry those nutty, toasty notes naturally, but a closer look at the ingredient list revealed processed butter, canola oil, and added “flavoring” — suggesting artificial hazelnut or butterscotch notes. The gap between real brown butter and this oil version felt similar to the difference between fresh truffle and truffle oil. Not bad per se, but unexpected if you’re not prepared for it.

Chef Lee Chan-yang personality expressed

Oil Tips and the French Fry Pairing

I tried it both on the burger and as a standalone dip. The flavor lands between hazelnut and butterscotch — not sweet exactly, but distinctly aromatic. If you’re unfamiliar with this profile, it can feel quite disorienting. Personally, I found it worked better as a dipping sauce for the french fries than drizzled over the burger itself.

Final Verdict

The burger on its own is genuinely impressive — strong beef flavor, well-balanced caramelized onions, crispy bacon, and a soft squid ink bun that ties everything together. It’s easily one of Lotteria’s best limited releases. The brown butter oil, however, is the wild card. Taste it on its own first, then decide how much (if any) to add.

Lotteria is one of Korea’s original fast food chains, and their chef collaboration series shows how Korean fast food is evolving beyond the basics. If you’re visiting Korea and want to try something that sits between a regular burger joint and a chef’s tasting menu, this limited edition is worth tracking down.

FAQ

Q. What does brown butter oil taste like?

It has nutty, toasty notes reminiscent of hazelnut and butterscotch — but without actual sweetness. This version uses processed butter with canola oil and added flavoring, so it’s closer to truffle oil than fresh truffle in terms of authenticity. Try a small dip before committing it to your burger.

Q. Is the squid ink bun just for looks, or does it affect the taste?

Mostly visual. The squid ink gives the bun its jet-black color and a very subtle briny undertone, but it doesn’t dominate the flavor. The baked cheddar and mozzarella on top contribute more to the taste than the ink itself.

Q. How does this compare to the previous Napoli Matfia Mozzarella Burger?

The Mozzarella Burger leaned into stretchy cheese and Italian-inspired flavors, while the Burnt Beef Burger focuses on depth through caramelization and char. This one feels more classically “burger” in structure but more adventurous with the brown butter oil element. Both are part of Lotteria’s chef collaboration series.

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Lotteria Burnt Beef Burger Review — Chef Collab [Korean Food]