Tonkatsu Katsu Curry and Katsu Rice Bowl

Ingredients

• 4 × 180 g pork loin cutlets, fat membrane scored at 2 cm intervals to prevent curling
• 1 tsp fine salt, applied 30 minutes before coating
• ½ tsp ground black pepper
• For the double-coat
• 80 g plain flour, spread on a flat plate
• 2 eggs, beaten
• 150 g panko breadcrumbs, large, irregular, airy crumb; not fine Western breadcrumbs
• For frying
• 1.5 litres neutral vegetable oil, sufficient depth for deep frying
• To serve — tonkatsu
• ½ white cabbage, finely shredded raw
• 4 tbsp tonkatsu sauce
• 1 tsp karashi mustard, Japanese hot mustard
• For katsudon (donburi variant)
• 400 ml dashi
• 60 ml soy sauce
• 60 ml mirin
• 1 medium onion, thinly sliced
• 4 eggs, beaten
• 800 g cooked Japanese short-grain rice, hot, portioned into four donburi bowls
• For katsu curry (curry variant)
• 500 ml Japanese curry sauce, prepared from roux blocks or from scratch; poured alongside, not over, to preserve crust
• 800 g cooked Japanese short-grain rice, hot, portioned

Method

1. 1
   Pound each pork loin cutlet gently between two sheets of plastic wrap to an even thickness of 2 cm. Score the fat membrane at 2 cm intervals. Season both sides with salt and pepper. Leave uncovered at room temperature for 30 minutes. The surface should appear dry and the salt fully absorbed before coating begins.
2. 2
   Set out three flat vessels in sequence: flour, beaten egg, panko. Dredge each cutlet in flour, pressing so the entire surface is coated; shake off the excess. Draw the floured cutlet through the beaten egg, ensuring full coverage with no dry patches. Press the cutlet firmly into the panko, turning and pressing again so the crumb adheres in an even, generous layer. Set the breaded cutlets on a rack and allow to rest, uncovered, for 5–10 minutes. The panko surface should feel firm and no longer loose — it will not shed on contact with the oil.
3. 3
   Heat the oil in a deep, heavy vessel to 165°C. This is where the dish lives or dies: oil below 160°C will saturate the panko before the coating sets, producing a dense, oil-heavy crust rather than the characteristic airy, crisp structure that distinguishes katsu from its European antecedents. Add one or two cutlets at most. Fry for 3–4 minutes until the coating is pale gold and the pork is barely cooked through. Remove, drain on a rack, and rest for 3 minutes — heat equalises across the cutlet during this interval. Raise the oil to 185°C and return each cutlet for 1–2 minutes until the crust is a deep, even golden brown. The sound changes from a vigorous sizzle to a quieter, steady hiss as moisture leaves the crust.
4. 4
   Transfer the twice-fried cutlets to a clean rack. Rest for 2–3 minutes. Carryover cooking completes the interior; the juices redistribute. The crust should remain audibly crisp when tapped lightly with the back of a knife.
5. 5
   To serve as standalone tonkatsu: cut each rested cutlet crosswise into strips at the moment of serving, preserving the crunch-to-bite geometry. Plate with a mound of finely shredded raw cabbage, a spoonful of tonkatsu sauce, and a small amount of karashi mustard alongside. The cabbage should be cold and crisp — its freshness is the structural counterpoint to the hot, rich cutlet.
6. 6
   To prepare katsudon: while the rested cutlets are on the rack, combine dashi, soy sauce, and mirin in a small sauté pan. Add the sliced onion and simmer until softened and translucent. Cut the rested cutlets into strips and lay them over the onion in the pan. Pour beaten egg evenly over the cutlet strips. Cover the pan briefly — 30–45 seconds — over medium heat until the egg is just set but still soft and slightly glossy at the centre. Slide the entire assembly over a bowl of hot rice. The egg should not be fully firm; a soft, yielding set is the correct result.
7. 7
   To plate katsu curry: portion hot rice onto plates. Slice each rested cutlet into strips and place beside, not over, the rice. Pour the hot curry sauce into the space between rice and cutlet, so the sauce does not contact the crust directly. The panko should remain visibly dry and raised on its exposed face at the moment of service.