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Pork Katsu Sandwich

This homemade pork katsu sandwich, known in Japan as a katsu sando, is the ultimate high-protein lunch. By marinating the pork in shio koji, the meat becomes incredibly tender and seasoned right to the core, providing a beautiful contrast to the golden, crunchy panko breadcrumb coating. It is a sophisticated take on a classic snack that balances savoury, salty, and acidic flavours perfectly.

Ideal for a weekend treat or an impressive packed lunch, this recipe uses soft milk bread and a zesty lemon-macerated cabbage to cut through the richness of the fried pork cutlet. Serve these sandwiches sliced into neat fingers for an authentic Japanese cafe aesthetic. Not only is it a textural delight, but it also provides a substantial, protein-rich meal that is both comforting and satisfying.

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Ingredients for Pork Katsu Sandwich

  • 350g boneless pork loin, fat trimmed 1/4"-thick

  • 50g shio koji seasoning

  • 2 teaspoons kosher salt

  • 1/2 small head of green cabbage, core removed, very thinly sliced (about 450g )

  • 2 Meyer lemons or regular lemons

  • Kosher salt

  • 2 large eggs, beaten to blend

  • 375g panko (Japanese breadcrumbs)

  • 240ml plain flour

  • Vegetable oil (for frying

  • about 1450ml )

  • Tonkatsu sauce, preferably Bull-Dog, and Dijon mustard (for serving)

  • 8 (1/2"-thick) slices milk bread, crusts removed

Slice pork crosswise into 4 medallions. Place between 2 sheets of plastic wrap; gently pound with a meat mallet to 5"-wide pieces.

Whisk koji, salt, and 240ml water in a medium bowl until salt dissolves. Add pork; cover and chill at least 8–24 hours.

Drain pork (no need to rinse off koji if it sticks); set aside. Place cabbage in a medium bowl. Finely grate lemon zest over; slice lemons in half and squeeze in the juice. Season cabbage with salt. Using your hands, toss and squeeze cabbage until slightly wilted, about 5 minutes. Chill until ready to use.

Place eggs, panko, and flour in 3 separate shallow bowls. Whisk 2 tablespoons water into eggs. Line a rimmed baking sheet with paper towels and set a wire rack inside; place near stovetop. Working with 1 piece of reserved pork at a time, dredge in flour, shaking off excess. Dip in eggs, letting excess drip back into bowl, then coat in panko, pressing to adhere before shaking off excess. Transfer to another rimmed baking sheet or a platter.

Pour oil into a medium heavy pot to come 2" up sides. Heat oil over medium-high until an instant-read thermometer registers 177°C to 185°C. Carefully lower a piece of pork vertically into skillet, letting it slide away from you into oil until it eventually lies flat. Cook, using tongs to keep meat submerged in oil, until golden brown underneath, about 1 minute. Using tongs, carefully turn over and cook until golden brown on the other side, about 1 minute. Transfer to prepared baking sheet; immediately season with salt. Repeat with remaining pieces of pork.

Drizzle tonkatsu sauce over cutlets. Spread mustard on 1 side of half of bread slices; top with cabbage mixture, then cutlet, sauce side up. Close sandwiches and slice each into thirds.

Disclaimer

While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.

Article history

The information on this page is peer reviewed by qualified clinicians.

  • 28 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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