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Melt 2 tablespoons of butter in a large pan over medium heat. Add the finely chopped small onion and sauté until it becomes softened and translucent, about 5-7 minutes.

Transfer the sautéed onions from the pan to a large mixing bowl and allow them to cool completely. This step is crucial for the texture of the patties.

To the bowl with the cooled onions, add the 1 pound of ground beef, 1/2 pound of ground pork, 2 eggs, 1/3 cup of panko breadcrumbs, 1/4 cup of milk, and season generously with salt and pepper to taste.

Using your hands, thoroughly mix all the ingredients in the bowl until well combined. Be careful not to overmix, as this can make the patties tough.

Divide the mixture into 4 equal portions and form them into individual patties. Make a small indentation in the center of each patty with your thumb; this helps prevent them from bulging while cooking.

Heat the same pan (or a clean one) over medium-high heat. Place the formed patties into the hot pan and cook for 5-7 minutes per side, or until they are nicely browned on both sides and cooked through. The internal temperature should reach 160°F (71°C). Remove the cooked patties from the pan and set aside.

In the same pan (no need to clean it, the drippings add flavor), add 1 tablespoon of sugar, 1 tablespoon of sake, 1 tablespoon of mirin, 1 tablespoon of soy sauce, 3 tablespoons of ponzu, and 1 tablespoon of butter.

Heat the sauce mixture over medium heat, stirring constantly until the sugar and butter are fully dissolved and the sauce is heated through and slightly reduced, about 2-3 minutes.

To serve, place a cooked hamburger patty on a plate. Spoon a generous amount of the Ponzu Butter Sauce over the patty. Garnish with fresh shiso leaves and a mound of daikon oroshi (grated daikon radish). Serve immediately, typically with steamed rice, miso soup, and a side salad for a complete Japanese meal.


Melt 2 tablespoons of butter in a large pan over medium heat. Add the finely chopped small onion and sauté until it becomes softened and translucent, about 5-7 minutes.

Transfer the sautéed onions from the pan to a large mixing bowl and allow them to cool completely. This step is crucial for the texture of the patties.

To the bowl with the cooled onions, add the 1 pound of ground beef, 1/2 pound of ground pork, 2 eggs, 1/3 cup of panko breadcrumbs, 1/4 cup of milk, and season generously with salt and pepper to taste.

Using your hands, thoroughly mix all the ingredients in the bowl until well combined. Be careful not to overmix, as this can make the patties tough.

Divide the mixture into 4 equal portions and form them into individual patties. Make a small indentation in the center of each patty with your thumb; this helps prevent them from bulging while cooking.

Heat the same pan (or a clean one) over medium-high heat. Place the formed patties into the hot pan and cook for 5-7 minutes per side, or until they are nicely browned on both sides and cooked through. The internal temperature should reach 160°F (71°C). Remove the cooked patties from the pan and set aside.

In the same pan (no need to clean it, the drippings add flavor), add 1 tablespoon of sugar, 1 tablespoon of sake, 1 tablespoon of mirin, 1 tablespoon of soy sauce, 3 tablespoons of ponzu, and 1 tablespoon of butter.

Heat the sauce mixture over medium heat, stirring constantly until the sugar and butter are fully dissolved and the sauce is heated through and slightly reduced, about 2-3 minutes.

To serve, place a cooked hamburger patty on a plate. Spoon a generous amount of the Ponzu Butter Sauce over the patty. Garnish with fresh shiso leaves and a mound of daikon oroshi (grated daikon radish). Serve immediately, typically with steamed rice, miso soup, and a side salad for a complete Japanese meal.
