🍔 Juicy Onion Soup Burgers – Flavor-Packed with French Onion Goodness

Ingredients

For the Caramelized Onions:

• 3 large yellow onions, thinly sliced

• 3 tbsp butter

• 1 tbsp olive oil

• 1 tsp sugar (optional, helps caramelize)

• ½ tsp salt

• ¼ cup beef broth (or a splash of dry white wine)

For the Burgers:

• 2 lbs ground beef (80/20 for juiciness)

• 1 packet French onion soup mix (or 3 tbsp homemade onion soup seasoning)

• 1 egg (optional, helps bind)

• ½ cup breadcrumbs (optional, for structure)

• Salt & black pepper, to taste

For Assembly:

• 4–6 brioche or sturdy burger buns

• 6 slices Gruyère cheese (or Swiss/Provolone)

• 2 tbsp butter (for toasting buns)

• Fresh thyme or parsley (optional garnish)

Instructions

1. Caramelize the Onions

• In a skillet, melt butter and olive oil over medium-low heat.

• Add onions, salt, and sugar; cook slowly for 25–30 minutes, stirring often until golden and jammy.

• Deglaze with beef broth (or wine), stirring until liquid evaporates. Set aside.

2. Make the Burger Patties

• In a large bowl, mix ground beef, onion soup mix, egg, breadcrumbs, salt, and pepper.

• Form into 4–6 patties, pressing a slight dent in the center (prevents puffing while cooking).

3. Cook the Burgers

• Heat a skillet or grill pan over medium-high heat.

• Cook patties 4–5 minutes per side (or until desired doneness).

• In the last 2 minutes, top each burger with Gruyère cheese and cover to melt.

4. Toast the Buns

• Spread butter on buns and toast in a skillet until golden.

5. Assemble

• Place burger patties on buns.

• Top generously with caramelized onions.

• Garnish with thyme or parsley.