The Surprising History of Loco Moco

At its most basic, loco moco features a scoop of fluffy white rice, a seasoned beef patty seared crisp at the edges, and brown gravy spiked with soy sauce, all crowned with a sunny-side up egg. Doctor it as you please with hot sauce, more soy sauce, or ketchup. Then grab almost any utensil—fork, spoon, chopsticks—and drag it through that quivering yellow yolk. Take a bite and savor the rich, umami-soaked, stick-to-your-ribs goodness.

Of late, TikTok foodfluencers have been riffing on the classic Hawaiian comfort dish, racking up views with au poivre twists and vegan versions. But it's the simple rice-and-beef recipe that anchors the menus of beachside diners and food trucks. Dwayne Johnson even gave loco moco a recent PR boost, declaring it one of his favorite post-workout foods.

Loco moco is having a moment. But in a sense, it has been emblematic of Hawai'i going all the way back to its days as a 30-cent after-school special thrown together for hungry teenagers. Though quintessential to the islands, every loco moco ingredient comes from somewhere else—mirroring the state’s long and at times complicated legacy of migration, colonization, and reinvention.

Rice, the base and heart of the dish, first arrived with the Hawaiian sugar boom of the mid-19th century, when American plantation owners began recruiting Chinese immigrants to work the cane fields. Rice paddies soon replaced many of the irrigated terraces where native Hawaiians—who arrived from Polynesia some 800 years prior—had grown taro for poi, the base starch of traditional cuisine. As the plantations expanded, waves of Japanese, Korean, Filipino, and Portuguese laborers followed, each community bringing its own traditions, techniques, and ingredients—including soy sauce, which has become a staple in many Hawaiian kitchens.

Beef too was an import to the islands. In 1793, a Royal Navy officer presented a handful of cattle to King Kamehameha I, the first ruler of the unified Hawaiian Kingdom, who was so pleased that he placed a kapu—a taboo—on killing them. Within decades, feral cows were trampling the islands. Kamehameha’s son brought in Mexican vaqueros to tame the herds and teach locals to rope, breed, and slaughter. These Hawaiian cowboys, known as paniolo, built a thriving cattle business on the Big Island, and shipped their cows to Honolulu for processing.

Starting in the 1930s, mobile wagons served lunches on cheap paper plates to plantation camp workers. These “plate lunches” would eventually go on to become standard restaurant fare, typically consisting of a holy trinity made up of rice, meat, and one scoop of American-style macaroni salad. As more workers from across the globe arrived to Hawai'i, more blended meals began to emerge—first at potlucks and parties, then at restaurants: butter mochi, which marries the richness of American butter cake to the chew of Japanese mochi; saimin, a noodle soup layering Chinese noodles, Japanese dashi broth, and Filipino and Portuguese spices; huli huli, a BBQ chicken dish marinated in a soy sauce, ginger, pineapple, and ketchup blend.

Read about Hawai'i's family-owned saimin noodle shops

All that mixing resulted in a distinctive fusion cuisine known as “Local” on the islands. Loco moco, with its steamed rice and all-American beef patty, is among the purest of expressions.

The ingredients converged in 1949 at the Lincoln Grill, on the Big Island city of Hilo, an after-school hangout for local teens. As the story goes, owners Richard and Nancy Inouye assembled an off-menu adaptation of the plantation plate lunch. Instead of macaroni salad, they paired rice and beef with housemade gravy and an egg. Their regulars gave the 30-cent meal its catchy moniker: "loco," in honor of one of one teen named George "Crazy" Okimoto (loco means crazy in Spanish), and "moco," well, just because it rhymed.

Other eateries soon picked up the recipe, but none of them did more to popularize loco moco than Hilo’s Cafe 100, opened by World War II veteran Richard Miyashiro, who had served in the 100th Infantry Battalion, a decorated unit of second-generation Japanese-American soldiers. The men of the 100th came home to a changed Hawai’i: the plantation system their parents labored under was in decline and many veterans became the first people in their families to attend college or, like Miyashiro, open small businesses, according to Rachel Laudan, author of The Food of Paradise: Exploring Hawaii's Culinary Heritage.

Miyashiro named the restaurant after his unit, serving classic Hawaiian plate lunches and, later, loco moco. He even trademarked “Loco Moco” and “Home of The Loco Moco.” Today Cafe 100 is run by Miyashiro’s daughter and serves more than 30 patty options, from Portuguese sausage to mahi mahi.

By the 1990s, loco moco had gone upscale. James Beard Award winner Alan Wong topped a beef slider with brown gravy and a fried quail egg at The Pineapple Room, his Honolulu restaurant. The high-end rendition introduced tourists to the dish and licensed other chefs to create new variations. Over the last few decades, it has proliferated even more. You can now find loco moco slathered in Japanese curry, or dripping with truffle cream.

In Ohana Style, a new cookbook from Top Chef finalist Sheldon Simeon, the loco moco is at once innovative and an homage: gravy made with kimchi is a nod to Korean influence on the islands, and Spam patties are a tribute to the canned rations many Hawaiians survived on during World War II.

“There are so many nuances that make up Hawai’i cuisine,” explains Simeon, who owns two restaurants in Maui. But whether it's basic or chef-y, he insists, the fundamental appeal doesn't change. "If there's loco moco on the menu," Simeon says, "Hawai'i kids will get loco moco."