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A close up of a sandwich cut in half sitting on top of a table

French Onion Soup Sliders

These French onion soup burgers are packed with all of the flavor of onion soup and topped with melty cheese and caramelized onions!
Course Main Course
Cuisine American
Keyword easy dinner recipes, game day recipes, weeknight dinner recipes
Prep Time 10 minutes
Cook Time 40 minutes
Total Time 50 minutes
Servings 12 sliders
Calories 419kcal


  • 2 sweet onions
  • 3 tablespoons butter
  • 2 pounds ground beef
  • 2 tablespoons beef base
  • 1 teaspoon onion powder
  • 1/2 teaspoon celery seed
  • 1/2 teaspoon dried parsley
  • 1/4 teaspoon ground black pepper
  • 2 tablespoons butter
  • 8 ounces Grand Cru cheese grated or very thinly sliced
  • 12 toasted slider buns or hard rolls split in half


  • Slice the roots and tips off the onions. Cut in half and slice into half rings.
  • Heat a medium skillet over medium heat and melt the butter.
  • Once the butter has melted add the onions and cook over medium low heat for 30 to 40 minutes, stirring every couple of minutes, until the onions are caramelized. Add a little water if the onions start to dry out or burn.
  • In a large bowl, stir together the beef base, onion powder, celery seed, parsley, and black pepper. Add the ground beef to the mixture and use your hands to work the seasoning all throughout the beef.
  • Break the mixture in half. Break each half into half again. Separate each portion into 3 chunks of meat and lightly roll into balls.
  • Heat a griddle or large skillet over high heat. Add enough butter to coat the bottom of the griddle or skillet.
  • Place the balls of meat at least 3 inches apart on the griddle and let cook on high for 2 minutes or until the bottoms are nicely seared.
  • Flip the meat over and immediately use a spatula to press the ball straight down to flatten it out. Continue cooking for 2-3 minutes and then flip. Top with cheese and continue cooking until the cheese has melted and the burger is done to your liking.
  • Repeat with remaining burgers as necessary until all are cooked, adding more butter to the griddle as necessary.
  • Place the burgers on the buns, top with the caramelized onions, and enjoy!


Calories: 419kcal | Carbohydrates: 20g | Protein: 21g | Fat: 27g | Saturated Fat: 12g | Cholesterol: 87mg | Sodium: 360mg | Potassium: 288mg | Fiber: 1g | Sugar: 5g | Vitamin A: 325IU | Vitamin C: 2.6mg | Calcium: 243mg | Iron: 2.6mg