Juicy French Onion Soup Burgers Recipe with Mayo Sauce

These juicy burgers are packed with french onion soup flavors and are sandwiched between two buns with a mayo based dijonnaise sauce.

5 from 2 votes

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Course: Dinner, Lunch

Cuisine: American, French

Keyword: burger, french onion, french onion burger, french onion soup, french onion soup burger, grill, grilling, onion

Prep Time: 10

Cook Time: 40

Total Time: 50

Servings: servings

Calories: 709kcal

Slice the onions. Add olive oil to a pan. Cook the onions on medium heat until caramelized, about 20-30 minutes.
Add ground beef to a medium bowl. Mix with the packet of onion soup mix and worcestershire sauce. Form 1 inch thick patties using your hands. Press a small dimple in the middle of the burger.
On medium-high heat, cook the burger. After 3-5 minutes, flip the burger. Top with cheese and cover. After 3-5 minutes remove burger from heat once desired internal temperature is met.
Toast buns on medium heat with a little olive oil.
Add dijonnaise sauce to bottom bun. Place burger patty on top of the bottom bun. Top with onions. Place top bun over onions. Serve immediately.

leftover burgers can be stored in an airtight container in the fridge for up to 3 days.
leftover onions can be stored in an airtight container in the fridge for up to 1 week.
leftover hamburger buns can be stored in a resealable bag for up to 1 week. The buns will lose freshness each day. To preserve freshness, store in the freezer.
burger buns can be frozen for up to 3 months to preserve freshness.
reheat leftovers before serving
add a dimple to the middle of each burger to prevent shrinking
80/20 ground beef should be used