People walk into our Fullerton store, look at the board, and ask the same question. What makes this a K-burger and not just a burger?
It is a fair question. The bun looks familiar. The fries look familiar. The answer is in what goes between the buns, and in how the whole menu is put together.
A K-burger does not assume the patty is beef
In most American burger chains, beef is the default and everything else is an alternative. In Korea, that hierarchy never took hold. Our signature item at LOTTERIA is the Shrimp Burger at $6.99, a whole shrimp patty with tartar and thousand island sauce, lettuce and onion on a toasted sesame bun. It is not a substitute for a beef burger. It is the flagship.
The same logic runs down the rest of the board. The Bibim Rice Burger at $9.49 swaps the bread entirely for rice buns, then stacks a bulgogi seasoned beef patty, a fried egg, lettuce, onion and gochujang sauce. The K-Chicken Sandwich at $5.99 uses spicy gangjung sauce, the same sticky sweet heat you find on Korean fried chicken.
The sauces come from the Korean table
Bulgogi sauce, gochujang and gangjung sauce are not garnishes borrowed for novelty. They are the flavors Korean families cook with at home, moved onto a bun. Our Bulgogi Burger at $6.49 tastes like bulgogi because it is seasoned like bulgogi, not because a marinade was poured over a standard patty at the end.
Sides and desserts are part of the meal, not an afterthought
Shake It Fries at $3.79 arrive with a seasoning pouch. You drop the fries in the bag, pick onion or cheese, shake it yourself, and eat them straight out of the bag. Shake It Nugget at $3.99 works the same way.
Dessert gets the same treatment. Cup Bingsu at $4.99 is a Korean style slush layered with red bean paste, fruit cocktail, mini rice cakes, yakgwa and roasted grain powder, and matcha is available. It is not a milkshake variant. Bingsu is a Korean summer tradition that arrived on the menu on its own terms.
Where the format came from
LOTTERIA opened in Seoul in 1979. The name is a combination of Lotte and cafeteria. Over four decades the brand grew to more than 1,600 restaurants across seven countries, and in 2024 it went through a full brand identity renewal. In August 2025 the first United States store opened here in Fullerton.
Try it and decide for yourself
The fastest way to understand a K-burger is to order one. We are at 150 W Orangethorpe Ave, Fullerton, CA 92832, open 10am to 10pm daily with dine-in, take-out and drive-thru. The Lunch Special runs 11:30am to 2pm on weekdays, with the Shrimp Combo at $9.99.