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A steaming plate of savory bangers and mash with onion gravy, featuring golden-brown sausages on creamy mashed potatoes smothered in rich gravy.

Ultimate Savory Bangers and Mash with Onion Gravy

A definitive recipe for the ultimate comfort food, featuring juicy, caramelized sausages, ethereally smooth and rich mashed potatoes, and a deeply savory, slow-cooked onion gravy. This guide focuses on technique to build layers of flavor for a restaurant-worthy plate. It's a foolproof dish guaranteed to gather everyone around the table.
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Prep Time 20 minutes
Cook Time 1 hour 10 minutes
Total Time 1 hour 30 minutes
Servings: 4
Course: Main Course
Cuisine: British
Calories: 850
Ingredients Equipment Method Notes

Ingredients
  

  • For the Onion Gravy: 2-3 large brown onions, sliced into half-moons
  • 1 tbsp unsalted butter
  • 1 tbsp olive oil
  • A few sprigs of fresh thyme
  • 1 heaped tbsp all-purpose flour
  • 1 tbsp Worcestershire sauce
  • Splash of red wine or water
  • Salt and black pepper to taste
  • For the Mash: 1 kg 2.2 lbs) floury potatoes (e.g., Maris Piper or Russets
  • 1 tsp wholegrain mustard
  • A few gratings of fresh nutmeg
  • Salt and white pepper to taste
  • For the Bangers: 6-8 good quality pork sausages e.g., Cumberland or Lincolnshire
  • 1 tsp vegetable or olive oil

Equipment

  • Heavy-based saucepan
  • Large pot
  • Colander or strainer
  • Potato ricer or masher
  • Heavy-based frying pan
  • Chef's knife
  • Cutting board
  • Measuring spoons
  • Measuring jug
  • Wooden spoon
  • Whisk
  • Grater (for nutmeg)

Method
 

  1. Start the onion gravy: In a heavy-based saucepan over medium-low heat, melt the butter with the olive oil. Add the sliced onions and a pinch of salt. Cook gently for 30-40 minutes, stirring occasionally, until deeply caramelized and golden brown.
  2. Sprinkle the flour over the caramelized onions and stir for 1 minute to cook out the raw taste.
  3. Deglaze the pan with a splash of red wine (or water), scraping up any browned bits. Add the Worcestershire sauce and thyme sprigs.
  4. Gradually pour in the beef stock while stirring constantly to avoid lumps. Bring to a gentle simmer and cook for 15-20 minutes until thickened. Season with salt and pepper. Remove thyme sprigs and keep warm on low heat.
  5. Make the mash: Place the peeled potato chunks in a large pot of cold, salted water. Bring to a boil, then simmer until fork-tender.
  6. Drain the potatoes well, then return them to the hot, dry pot over the lowest heat for 1 minute, shaking gently to steam off excess moisture.
  7. Pass the potatoes through a ricer back into the pot (or mash vigorously until completely smooth).
  8. Stir in the butter until melted and incorporated. Gradually add the warm milk or cream, stirring until smooth and silky. Stir in the wholegrain mustard and nutmeg. Season generously with salt and white pepper. Cover and keep warm.
  9. Cook the sausages: Place sausages in a cold, heavy-based frying pan with a tiny drizzle of oil. Turn heat to medium-low.
  10. Cook for 15-20 minutes, turning regularly, until evenly browned and cooked through.
  11. To serve: Spoon a generous mound of mash onto warm plates. Create a slight well and arrange 2-3 sausages over the mash. Ladle a generous amount of onion gravy over the sausages and mash. Optionally garnish with chopped fresh parsley.

Notes

For the smoothest mash, dry the potatoes thoroughly after draining and use a ricer. Do not prick high-quality sausages to retain juices. The onion gravy can be made ahead and reheats beautifully. If gravy is too thin, thicken with a cornstarch slurry. If too thick, thin with hot water or stock. Variations: Add mushrooms to the gravy, use different sausage varieties, or add cheese or root vegetables to the mash.