Katsudon is a beloved Japanese comfort food: a bowl of steamed rice topped with a breaded, deep-fried pork cutlet (tonkatsu) that is simmered in a sweet-savory dashi-based sauce with onions and beaten egg. The dish is served hot, with the egg softly set and the cutlet still crisp at the edges. It is a staple of Japanese home cooking and is often eaten for lunch or dinner. This guide walks you through making katsudon from scratch, including the tonkatsu, the simmering sauce, and how to assemble the bowl for the best texture.
What You’ll Need
- 2 boneless pork loin chops or cutlets, about 3/4 inch (2 cm) thick (about 6 oz / 170 g each)
- Salt and freshly ground black pepper
- All-purpose flour, for dusting
- 1 large egg, beaten (for the breading)
- 1 cup (100 g) panko breadcrumbs
- Vegetable oil, for deep-frying
- 1/2 onion, thinly sliced
- 3/4 cup (180 ml) dashi stock (or substitute 3/4 cup water + 1/2 tsp dashi powder, or use chicken stock)
- 2 tbsp soy sauce
- 2 tbsp mirin
- 1 tbsp sugar
- 2 large eggs, beaten (for the simmering)
- 2 servings of cooked Japanese short-grain rice (about 1.5 cups / 300 g cooked rice per bowl)
- Optional garnish: sliced green onions, shichimi togarashi (Japanese chili spice)
Step-by-Step
- Prepare the pork: If the pork loin has a fat cap, score it lightly in a crosshatch pattern to prevent curling. Season both sides with salt and pepper.
- Tenderize lightly: Using the back of a knife or a meat mallet, gently pound the pork to an even thickness of about 1/2 inch (1.3 cm). Do not over-pound; you want it tender but not paper-thin.
- Set up the breading station: Place flour in one shallow dish, beaten egg in another, and panko in a third. Dredge each pork chop in flour, shaking off excess, then dip in egg, then press into panko, ensuring an even coat. Set aside on a plate.
- Heat the oil: In a deep skillet or pot, heat about 1 inch (2.5 cm) of vegetable oil to 340°F (170°C). If you don’t have a thermometer, test by dropping a panko crumb into the oil; it should sizzle and float immediately.
- Fry the tonkatsu: Carefully place the breaded pork into the hot oil. Fry for 2–3 minutes per side, until golden brown and cooked through. The internal temperature should reach 145°F (63°C) for whole pork cuts, as per USDA FSIS safe minimum. Drain on a wire rack or paper towels. Let rest for 3 minutes.
- Slice the tonkatsu: Cut the rested tonkatsu into 1-inch (2.5 cm) wide strips. Set aside.
- Start the simmering sauce: In a small skillet (about 8–10 inches / 20–25 cm), combine the dashi, soy sauce, mirin, and sugar. Bring to a simmer over medium heat, stirring to dissolve the sugar.
- Add the onion: Add the sliced onion to the sauce and simmer for 2–3 minutes, until the onion is tender but still has a bit of bite.
- Add the tonkatsu: Lay the sliced tonkatsu over the onion in a single layer. Let it warm through in the sauce for about 1 minute.
- Pour in the beaten eggs: Drizzle the beaten eggs evenly over the tonkatsu and onion. Cover the skillet with a lid and cook for 30–60 seconds, until the egg is just set but still soft and slightly runny. The egg should be cooked to 160°F (71°C) for food safety; if you prefer a firmer egg, cook a bit longer.
- Assemble the bowls: Divide the hot cooked rice between two bowls. Carefully slide the tonkatsu and egg mixture from the skillet onto the rice, placing it on top. The sauce will soak into the rice.
- Garnish and serve: Sprinkle with sliced green onions and shichimi togarashi if desired. Serve immediately while hot.
Common Mistakes
- Overcooking the pork: Frying too long makes the cutlet dry. Use a thermometer and pull it at 145°F (63°C).
- Soggy breading: If you simmer the tonkatsu for too long, the crisp coating will become mushy. Keep the simmering step brief.
- Egg too firm: Cooking the egg until it’s fully hard will make the dish dry. The egg should be just set, like a soft omelet.
- Too much sauce: Adding too much dashi or soy sauce can make the rice soupy. Stick to the proportions, and if you like it less saucy, reduce the dashi slightly.
Tips
- Use day-old rice: Freshly cooked rice is too sticky and wet; slightly dried rice holds up better under the sauce.
- Make your own dashi: If you have kombu and bonito flakes, homemade dashi adds depth. But the instant powder works fine.
- Keep the oil clean: If the oil gets too hot, the panko will burn before the pork cooks. Maintain 340°F (170°C).
- Slice against the grain: Cutting the tonkatsu against the grain makes it easier to eat and more tender.
- Use a small skillet: A skillet that just fits the tonkatsu and onion helps the egg cook evenly and makes sliding the mixture onto the rice easier.
Troubleshooting
- Breading falls off: If the coating separates, you may have skipped the flour step or the oil wasn’t hot enough. Pat the pork dry before flouring, and make sure the oil is at temperature.
- Pork is tough: This usually means overcooking. Next time, pound the pork thinner and fry for less time. You can also try brining the pork in salt water for 30 minutes before cooking.
- Egg curdles or scrambles: If the heat is too high, the egg will scramble. Keep the heat at medium-low when pouring the egg, and remove from heat as soon as it sets.
- Sauce is too salty or too sweet: Adjust the soy sauce or sugar to taste. If it’s too salty, add a splash of water or dashi; if too sweet, add a little more soy sauce.
- Rice is too dry: If your rice is dry, sprinkle a little water over it before microwaving, or add a touch more sauce to the bowl.
Frequently Asked Questions
Can I use chicken instead of pork? Yes, chicken katsudon is common. Use boneless chicken thighs or breasts; cook to 165°F (74°C) for poultry.
What if I don’t have mirin? Mix 1 tbsp rice vinegar with 1/2 tsp sugar as a substitute. It won’t be as sweet, so you may want to add a bit more sugar.
Can I make katsudon ahead of time? It’s best fresh, as the breading loses crispness. You can prepare the tonkatsu and sauce ahead, but assemble just before serving.
Is katsudon gluten-free? Not as written, due to flour and soy sauce. Use gluten-free flour, tamari, and gluten-free panko for a GF version.
What is the difference between tonkatsu and katsudon? Tonkatsu is the fried pork cutlet alone; katsudon is the cutlet simmered with egg and served over rice.
Can I use store-bought tonkatsu? Yes, but it’s often thicker and may need less simmering time to avoid sogginess.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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