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Cast Iron Onion Burgers | Bottom Left of the Mitten

Cast Iron Onion Burgers

These Cast Iron Onion Burgers are so juicy! Topped with melted cheese, horseradish sauce and onions, this is one burger recipe you won't want to miss.
Course Main Dish
Cuisine Burger, Food to Drink to
Keyword burger
Prep Time 5 minutes
Cook Time 20 minutes
Total Time 25 minutes
Servings 4 burgers


  • 1 pound ground hamburger
  • 1 Tbs Worcestershire Sauce
  • 1/2 tsp salt
  • 1/4 tsp black pepper
  • 1 Tbs A1 Sauce
  • 1 Tbs A1 Dry Rub
  • 4 hamburger buns
  • 2 Tbs butter
  • 1 large yellow onion cut into thick slices
  • 4 slices cheddar cheese
  • 4 tsp oil
  • 1/4 cup mayonnaise
  • 1/4 cup horseradish sauce


  • Take the ground hamburger and add Worcestershire Sauce, A1 Sauce, salt and pepper and mix. Form into 4 patties. Shake the dry rub on top.
  • Place the cast iron skillet on the stove top and heat on medium/high for 3-4 minutes to get it good and hot.
  • Add oil to the pan. Place onions let sizzle for a few seconds then place burger on top.
  • To cook the burger as evenly as possible cover with a lid. Cook 8 minutes, that was the 'sweet spot' on medium heat.
  • Flip over so the onions are on top. Cook 6 minutes. Add cheese then cover again and cook an additional 2-3 minutes to melt.
  • Take the buns and smother in some butter and cook on a sheet pan for around 5 minutes.
  • Whip together mayonnaise and horseradish sauce. Top the toasted bun with the burger. Smother as much as you like of the sauce on the bun. Enjoy!