French Onion Burger


I've always been a burger fan. There's just something about ordering a burger with a pile of fries when you're out to eat. I've found that I have struggled with accomplishing this same level of satisfaction when making burgers at home. Don't get me wrong, with some lettuce, cheese, and ketchup and mustard, with the patty cooked just right, it can be good, but there's just something about a burger stacked up high (even if you do only end up eating half of it, we're all guilty of that sometimes) with a big bun and full of flavor.

This French Onion Burger is anything but lacking in flavor. I can honestly say it's one of my favorites and there is something so cozy and satisfying about it, with it still seeming fresh and not too overpowering.

French onion burger

Let's talk about the patty

I know when it comes to how your burger is cooked, it really is all about personal preference. Personally, I prefer my burger cooked medium but go with whatever you prefer here! I also highly recommend going with a good size patty, as the size and height really makes a big difference when stacking your toppings on top. After you cook your burger it's all about prepping and layering your toppings...

  • caramelized onions - the taste and texture truly make this a french onion burger
  • mushrooms - smaller in size and sliced make these little guys the perfect partner to the caramelized onions
  • arugula - adding that bit of freshness that a burger definitely needs
  • dijon mustard - spread it on there and save some for on the side too
  • gruyere cheese - bold I know, but very worth it

French onion burger with dijon

Caramelized onions and mushrooms- a match made in heaven!

The toppings are the star here and really separate this burger from the rest. When caramelizing the onions, ensure that they are sliced thinly and cooked thoroughly until caramelized. This also goes for the mushrooms as well, slicing nice and thin.

What really brings the toppings to the next level here is (you guessed it) the bourbon. The subtle flavor of the bourbon with the caramelized onions pairs perfectly with the mushrooms here.

Homemade french onion burger

When your patty is done (with the cheese melted on top of course), the toppings are prepped, and the bun is lightly toasted, it's all about stacking and layering! You will first want to place your burger with cheese on the bottom patty, then you will place your mushrooms on top, then the caramelized onions, and then a heaping pile of arugula on top. Last but certainly not least, spread some of that dijon mustard on the top bun and then place the bun on top and you're ready to dive in!

Burger with onions, mushrooms and arugula

May I suggest some fries on the side (it just doesn't seem right to have a burger without fries) and definitely some extra dijon mustard on the side for some occasional dipping as well! Now sit back and enjoy this cozy, winter burger.

Recipe Details:

Servings: 2

Prep Time: 30 minutes

Cook Time: 10 minutes

Total Time: 40 minutes

French Onion Burger

A beef burger, caramelized onions, cremini mushrooms, a little bit of bourbon (believe it or not), fresh arugula, and some dijon mustard all in between a brioche bun make for the best french onion burger!



  • 1/2 tbsp butter
  • 3/4 cup onions, thinly sliced
  • 2 tbsp bourbon
  • 1 tsp thyme
  • 1 tbsp olive oil
  • 1 cup cremini mushrooms, sliced
  • kosher salt and black pepper to taste
  • 2 8 ounce angus beef patties
  • 2 slices of gruyere cheese
  • 2 brioche buns
  • 1 cup arugula
  • dijon mustard, optional


  1. In a medium skillet over low heat, melt butter and add onions to skillet. Cook for 15-20 minutes, stirring occasionally or until caramelized.
  2. Add bourbon and cook, stirring for an additional minute. Stir in fresh thyme.
  3. In a separate skillet, heat olive oil over medium heat and add mushrooms to skillet. Leave, without stirring, to allow mushrooms to brown for 3-4 minutes. After, stir and continue cooking until evenly browned. Season to taste with salt and pepper.
  4. Heat heavy bottomed skillet over medium-high heat. Add beef patties and cook approximately 4-5 minutes each side for medium or cooked to desired doneness. During final two minutes of cooking, top each patty with sliced gruyere.
  5. Toast brioche buns until lightly toasted.
  6. Place each patty on the bottom buns and then add mushrooms, caramelized onions, and arugula on top of each patty. Spread dijon mustard on the inside of top buns if desired. Place top buns on top of each and enjoy!

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