Katsu Sando (Japanese Pork Cutlet Sandwich)

About This Recipe

Katsu sando is the sandwich that convenience stores and specialty shops across Japan have turned into an art form: a thick pork cutlet, breaded in panko and fried until shatteringly crisp, sandwiched between crustless shokupan (Japanese milk bread) with a sweet-tangy tonkatsu sauce. This version adds a layer of slow-cooked golden onions for extra sweetness and moisture, a common addition in home versions that keeps the sandwich from tasting dry. The technique that makes katsu sando work is temperature control on the fry and a genuinely soft, pillowy bread. The pork should be pounded to an even thickness, breaded in three stages (flour, egg, panko), and fried at 170C/340F until deep golden -- too cool and it absorbs oil, too hot and the panko burns before the pork cooks through. Resting the fried cutlet on a rack, not paper towels, keeps the crust from steaming and going soggy. Sliced katsu sando is a mainstay of Japanese convenience store cases (konbini) and train-station bento shops, prized for its contrast: soft bread, crisp panko, tender pork, sweet sauce. Cut on the diagonal, it shows off the layers -- the visual signature of a good katsu sando.

Ingredients

Serves 2

• 2 piecesboneless pork loin cutlets(about 150g each, pounded to 1.5cm)
• 1 tspsalt
• 0.5 tspblack pepper
• 0.5 cupall-purpose flour
• 2 largeeggs(beaten)
• 1.5 cupspanko breadcrumbs
• 2 cupsneutral oil(for frying)
• 1 mediumonion(thinly sliced)
• 1 tbspbutter
• 4 tbsptonkatsu sauce(or Worcestershire sauce mixed with ketchup)
• 1 tspJapanese mustard (karashi)(optional)
• 4 slicesshokupan (Japanese milk bread)(crusts removed)
• 2 tbspmayonnaise

Instructions

1. 1

   Caramelize the onion

   Melt butter in a skillet over medium-low heat. Cook onion slices, stirring occasionally, for 15 minutes until soft and golden. Set aside.

2. 2

   Season and bread the pork

   Season cutlets with salt and pepper. Dredge in flour, dip in egg, then press firmly into panko so it coats evenly on both sides.

3. 3

   Fry the cutlets

   Heat oil to 170C/340F in a deep pan. Fry cutlets 3-4 minutes per side until deep golden brown and cooked through (internal temp 63C/145F). Rest on a wire rack, not paper towels.

4. 4

   Rest and slice

   Let the cutlets rest 3 minutes, then slice into strips against the grain -- this makes the sandwich easier to bite through.

5. 5

   Assemble

   Spread mayonnaise and mustard on one slice of bread, tonkatsu sauce on the other. Layer caramelized onion, then sliced katsu, and close the sandwich.

6. 6

   Press and cut

   Wrap tightly in plastic wrap and press gently for 2 minutes to compact the layers. Cut crusts if not already removed, then slice diagonally in half.

Variations

• •

  Chicken katsu sando: swap pork loin for a butterflied chicken breast.

• •

  Ebi katsu sando: use breaded, fried shrimp instead of pork for a lighter version.

• •

  Spicy katsu sando: mix a teaspoon of sriracha into the mayonnaise.

Storage

Best eaten fresh within an hour of frying. If needed, store the fried cutlet (unassembled) in the fridge up to 2 days and reheat in a 200C oven for 8 minutes to re-crisp before assembling.

Frequently Asked Questions