french onion burgers;

french onion burgers;

Delicious onion-infused burger patties piled high with caramelized onions and topped with gooey mozzarelly cheese.

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Originally posted March 27, 2017. Updated July 24, 2026 for content and clarity.

These french onion burgers take everything you love about french soup, but stuff all that flavor into a tasty handheld burger–no spoon needed! And of course, you need to top it with a HEAP of caramelized onion and melty gooey mozzarella cheese, otherwise it wouldn’t live up to it’s name: french onion burgers.

French onion burgers are a definite must make. They’re honestly not that much harder than a plain burger, but you get soooo much more flavor, and get to feel all fancy! The secret ingredient is lipton french onion soup mix (affiliate link), so it’s not entirely “from scratch”.  But you get so much flavor from a shake of a packet! And let me tell you, caramelizing onions takes a while.

I didn’t quite use one whole packet, but in the future I will, so I’ve adjusted the recipe accordingly.  In addition to soup mix in the burger, I actually sprinkle some on the onions themselves too!  It might seem strange, but it saves you having to season the onions, and helps give them a great caramelized onion color.  Make sure you do lots of onions!  It’s a french ONION burger after all!

The base burger recipe here is what we call “momburgers”, aka the staple burger recipe my mom made for us growing up. It’s so, so tasty as a standard burger, huge, and juicy, and delicious! Somehow when I make it for myself it’s never quiiiiite the same, but I guess that’s what a mom’s love does! Either way, we managed to improve upon a great, but if you’re not in the mood for the extra work of french onion burgers, well a plain old classic momburger hamburger is pretty great too.

Remember, you can never have too much cheese!  You really want a good portion on each top bun so you can get that ooey gooey cheesy goodness with every bite!  I only put it on the tops of the buns, although I think you could double-side it if you’re feeling extra cheesy! Sliced mozzarella works fine, but if you really want ooey gooey mozzarella, I’d opt for block mozzarella and shred it yourself. There’s no better way!

I usually opt for the refrigerated blocks, not fresh mozzarella. Nothing’s stopping you from using fresh, but the moisture content can sometimes cause extra juiciness and I find the refrigerated mozzarella cheese works great. Usually the blocks are big enough to warrant another dinner–like stuffed chicken marsala, or pizza (although this pizza recipe does recommend burrata as a fancy cheese…but you can make it with regular mozzarella too!)

secrets to success;

Want all the best tips and tricks to make this recipe a success? Check out the blog post above to find out more!

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french onion burgers;

Delicious onion-infused burger patties piled high with caramelized onions and topped with gooey mozzarelly cheese.

Prep Time: 25 minutes minutes

Cook Time: 20 minutes minutes

Servings: 4

Author: bestwithchocolate.com

5 from 1 vote

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Ingredients

caramelized onions;

• 2 medium-large onions
• 1 Tbsp olive oil
• 1 tsp sugar (optional)

french onion burgers;

• 1 lb ground beef
• 1 egg
• ⅔ cup milk
• ½ cup breadcrumbs
• ½ tsp garlic powder
• ½ Tbsp soy sauce
• 1.5 oz packet french onion soup mix (I use lipton onion dip and soup mix)
• 6 potato buns
• mozzarella cheese

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Instructions

caramelized onions;

• Peel and slice onions into thin slices. You can adjust thickness based on preference, but the thinner, the faster they will cook.
• Heat a pan over medium-high heat. Add the oil, and allow it to come to temperature.
• Add onions to pan, and sautee, stirring on occasion until they begin to brown and get color, approx. 8-10 minutes.
• To fully caramelize the onions naturally, continue cooking until thick and jammy, maybe 10-15 minutes more. To save some time, you can (optional) add 1 tsp of sugar and cook for another 2-4 minutes.
• Add the remaining French onion soup mix to the caramelized onions and saute another 2 minutes. Once done, remove from the heat and set aside.

french onion burgers;

• In a large bowl, combine ground beef, 1 egg, ½ cup breadcrumbs, ⅔ milk, ½ tsp garlic powder and ½ Tbsp soy sauce. Add approximately ~¾ of the French onion soup mix, and gently mix together until combined. Do not over-mix. Form 4-6 patties.
• In a toaster oven or in a broiler, top potato buns with cheese and bake until toasty and melted.
• In the same pan used for the onions, add another splash of oil and allow to heat. Add the burger patties to the pan and cook to desired done-ness.
• Build your burger, layering a toasted bun, burger patty, mozzarella cheese and caramelized onions before putting a bun on top. Enjoy!

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