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Classic British steak burgers with Cheddar and onions on a BBQ table

Classic British Steak Burgers with Cheddar & Onions

Juicy beef burgers made with good‑quality British steak mince, topped with mature Cheddar and sweet fried onions – perfect for a back‑garden BBQ.
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Servings: 4 people
Ingredients Method Notes

Ingredients
  

For the burger patties
  • 600 g beef steak mince 15–20% fat (higher fat gives a juicier burger)
  • 1 small onion very finely grated or minced
  • 1 tbsp Worcestershire sauce
  • 1 tsp Dijon mustard
  • 1 medium egg yolk
  • 1 tsp fine sea salt
  • ½ tsp freshly ground black pepper
For the caramelised onions
  • 2 large onions thinly sliced
  • 1 tbsp butter
  • 1 tbsp vegetable oil or rapeseed oil
  • 1 tsp soft brown sugar
  • 1 tsp balsamic vinegar optional, for tang
To serve
  • 4 brioche or soft white burger buns split
  • 4 slices mature Cheddar
  • Little gem or iceberg lettuce leaves
  • 1 –2 tomatoes sliced
  • Ketchup mayo or burger sauce, to taste

Method
 

Make the burger mix
  1. Add the beef mince to a large mixing bowl and break it up lightly with your fingers.
  2. Add the grated onion, Worcestershire sauce, Dijon mustard, egg yolk, salt and pepper.
  3. Gently mix with your hands just until everything is evenly combined – don’t overwork it or the burgers can become dense.
  4. Shape and chill the patties
  5. Divide the mixture into 4 equal portions (about 150 g each).
  6. Shape each portion into a ball, then flatten into a patty roughly 2 cm thick.
  7. Use your thumb to press a shallow dimple in the centre of each burger (this helps them stay flat as they cook).
  8. Place the patties on a plate or tray, cover and chill in the fridge for at least 30 minutes – this firms them up so they hold together better on the grill.
Cook the onions
  1. While the burgers chill, heat the butter and oil in a wide frying pan over medium heat.
  2. Add the sliced onions and a pinch of salt. Cook gently for 10–15 minutes, stirring occasionally, until very soft and starting to turn golden.
  3. Sprinkle over the brown sugar and add the balsamic vinegar (if using). Cook for another 3–5 minutes, stirring, until the onions are sticky and deeply golden.
  4. Turn the heat off and set aside. Rewarm briefly before serving if needed.
Preheat the BBQ
  1. Light your BBQ and aim for medium‑high direct heat: coals covered in a light ash but still glowing red, or a gas BBQ preheated for 10–15 minutes with the lid down.
  2. Clean and oil the grill grates lightly to help prevent sticking.
  3. Grill the burgers
  4. Take the patties out of the fridge 10 minutes before cooking.
  5. Place the burgers on the grill over direct heat. Cook for about 4–5 minutes per side for cooked‑through but still juicy (adjust a little depending on thickness and your BBQ).
  6. Avoid pressing down on the burgers with a spatula, as that squeezes out juices.
  7. For the last minute of cooking, add a slice of Cheddar to each burger and close the lid so it melts.
  8. (If you prefer them more well done, give them an extra minute or so per side.)
Toast the buns
  1. While the cheese is melting, place the cut sides of the buns face‑down on the grill for 30–60 seconds, just until lightly toasted at the edges.
Assemble and serve
  1. Spread ketchup, mayo or burger sauce on the bottom bun.
  2. Add lettuce and tomato slices.
  3. Place the cheesy burger on top.
  4. Spoon over a generous pile of warm caramelised onions.
  5. Cap with the top bun and serve straight away.

Notes

BBQ and serving notes

  • Meat choice: Using steak mince with 15–20% fat gives much better flavour and juiciness than very lean mince, which many UK burger recipes also recommend.
  • Make‑ahead: You can shape the patties up to a day in advance and keep them chilled, or freeze them between sheets of baking paper.

Build it up!

  • Add streaky bacon for a “bacon & Cheddar” version.
  • Swap Cheddar for blue cheese for a stronger flavour.
  • Offer a “pub‑style” twist by adding a spoonful of English mustard into the burger sauce.