Liver and Bacon with Mash and Onion Gravy
Why this recipe works
- Classic texture contrast: Creamy mash, crisp bacon, tender liver and glossy gravy give the plate a satisfying balance of soft, crisp and silky elements.
- Deep savoury flavour: Bacon fat, browned onions, beef stock and Worcestershire sauce build a rich, umami-led gravy without needing a long simmer.
- Brief searing keeps liver tender: Cooking the liver quickly over higher heat browns the outside while helping prevent the dry, grainy texture that comes from overcooking.
Get the most out of this recipe
Timing notes
- Serve immediately: Liver is at its best as soon as it is cooked; holding it for too long can make it firm and less delicate.
- Cook the elements in sequence: Start the potatoes first, then make the bacon and gravy while they simmer so the liver can be seared last.
Texture tips
- For tender liver: Pat the liver dry before seasoning and sear it briefly in a hot pan so it browns quickly without stewing.
- For smoother mash: Let the drained potatoes steam-dry in the hot pot before mashing, then beat in the warmed milk gradually.
Common mistakes
- Avoid overcooking the liver: Thin calf liver cooks very quickly; remove it once browned and just cooked to your preferred doneness.
- Watch the gravy thickness: If the onion gravy becomes too thick while the mash is finished, loosen it with a little more stock and return it to a gentle simmer.
Authenticity notes
- British home-style serving: Liver and bacon is commonly served as a hearty plated dinner with mashed potatoes and onion gravy rather than as a separate sauce-based stew.
- Why onion gravy fits: Sweet, softened onions help round out the mineral richness of liver and the saltiness of bacon.
Equipment you'll need
Ingredients
Instructions
- Peel the potatoes and cut into even chunks. Put them in a large pot, cover with cold water and add 1 tsp of the fine sea salt. Bring to the boil, then simmer for 15 to 18 minutes until very tender.
- While the potatoes cook, peel and thinly slice the yellow onions. Cut the bacon into short lengths. Pat the calf liver dry and season it with the black pepper and the remaining 1 tsp fine sea salt.
- Heat a large frying pan over medium heat and fry the bacon for 6 to 8 minutes, turning, until crisp and the fat has rendered. Lift the bacon to a plate, leaving the fat in the pan. If the pan looks dry, add 15 g of the unsalted butter.
- Add the onions to the pan and cook over medium-low heat for 10 to 12 minutes, stirring, until soft and deeply golden. Sprinkle over the plain flour and cook for 1 minute, stirring well so it does not catch. Gradually whisk in the beef stock, then stir in the Worcestershire sauce and simmer for 6 to 8 minutes until glossy and thick enough to coat the back of a spoon.
- Drain the potatoes well and return them to the hot pot for 1 minute to steam-dry. Add 55 g of the unsalted butter and mash until smooth. Warm the whole milk, then beat it into the mash until creamy; season to taste with a little more black pepper if you like.
- Push the onion gravy to one side of the pan, or pour it into a bowl and keep warm, then turn the heat up to medium-high. Add the remaining 15 g unsalted butter and quickly sear the liver for 60 to 90 seconds per side, just until browned but still slightly pink in the centre. Return the bacon to the pan for 30 seconds to warm through.
- Spoon the mash onto plates and top with the liver and bacon. Stir the gravy once more and spoon it over the top. Serve straight away while the liver is tender.
Recipe notes
Tips
- For tender liver, make sure the pan is properly hot and keep the cooking brief; it should be browned outside but still slightly pink in the middle.
- If the gravy thickens too much while you mash the potatoes, loosen it with a splash of beef stock and bring it back to a gentle simmer.
- If serving anyone who is pregnant, elderly, or immunocompromised, cook the calf liver until fully cooked through and piping hot.
Substitutions
- Replace whole milk with lactose-free milk for a similar richness in the mash.
- Replace unsalted butter with salted butter, then reduce the fine sea salt slightly to taste.
- Replace Worcestershire sauce with soy sauce for a similar savoury depth.
Storage
- Refrigerate up to 2 days
- Cool leftovers quickly and refrigerate in an airtight container. Reheat the mash with a splash of whole milk in a saucepan over low heat, stirring until piping hot; reheat the gravy gently and warm the liver briefly to avoid overcooking.
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Recipe overview
- Servings: 3 servings
- Total time: 55min (30min active)
- Difficulty: Medium
- Cuisine: British
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Allergens:
Gluten Milk Wheat
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