Caramelized Onion Blue Cheese Burger

Sink your teeth into this juicy, all-beef caramelized onion burger with blue cheese.

One of the best things about homemade burgers is being able to load it up with amazing toppings. These burgers are piled high with rich, sweet caramelized onions and salty, creamy blue cheese. It’s a flavor combination that you will love.

We used a tender brioche hamburger bun to assemble these blue cheese caramelized onion burgers. The brioche is soft and tender but sturdy enough to hold up to the beef, cheese and onions without falling apart. You won’t have a soggy mess before you finish eating the burger.  

It will take about 30 minutes to caramelize the onions and I figure one onion for each burger, maybe extra for munching. Onions are naturally sweet. They have enough sugar in them to caramelize on their own.  We added a little brown sugar to help the process along.

While the onions cook,  get the beef patties mixed and shaped and all the fixings together. 

Making a Caramelized Onion Burger:

This blue cheese and caramelized onion burger is easy to make. The most time-consuming thing is making the caramelized onions. If you make an extra-large batch you can use the extra onions to make a steak sandwich later in the week.

• Once the grill is hot and ready, grill the beef on one side, flip it and add the blue cheese letting the heat melt the cheese a little. 
• Toast the buns on the cooler side of the grill, and when the patties are done, remove them and the buns. 
• Spread the buns with the mayo and mustard. 
• Add the beef patties to the buns.
• Pile the caramelized onions onto the blue cheese side of the patty.
• Add the top part of the bun. 

This will be the best caramelized onion-blue cheese burger you have ever eaten.

This burger isn’t of the low-calorie, low-fat fare but I worked hard this afternoon. I shoveled two yards of top-soil from Don’s truck into my flower garden plot and I am going to eat this burger guilt-free. I deserve it!

What to serve with a caramelized onion burger.

The caramelized onions and blue cheese have a tone of flavor and the burger is pretty filling. You don’t need much to go along with these hearty burgers.

Serve them with a pile of potato chips or some homemade air fryer fries. If you want a great dip for your fries, try our chipotle aioli or our sriracha fry sauce.

If you’re serving potato chips you might like an onion soup dip or a bacon bean dip.

Caramelized Onion and Blue Cheese Burger

The sweetness of caramelized onions combines with blue cheese and an all-beef patty. We served this gourmet burger on a tender, rich brioche bun.

4.83 from 17 votes

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Prep Time: 40 minutes minutes

Cook Time: 30 minutes minutes

Total Time: 1 hour hour 10 minutes minutes

Servings: 4 servings

Calories: 1173kcal

Author: Pat Nyswonger

Ingredients

For the Caramelized Onions:

• 4 large yellow onions sliced in rounds 1/4-inch thick
• 2 tablespoons butter
• 2 tablespoons olive oil
• 1 tablespoon brown sugar

For the Beef Patties:

• 1-½ pound lean ground beef I like the 80% from grass fed beef
• 1 teaspoon kosher salt
• ½ teaspoon freshly ground black pepper
• 2 large onions sliced in 1/4-inch rounds
• 2 tablespoons mayonnaise
• 2 teaspoons Dijon mustard
• 4 ounces blue cheese slices or crumbles
• 4 large brioche burger buns

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Instructions

For the Caramelized Onions:

• In a large Dutch oven or heavy-bottomed skillet over medium-low heat, add the oil and butter and heat until melted. Add the onions, breaking up the rings and toss to coat the onions completely.
• Allow the onions to cook, without a lid, stirring every 2-3 minutes. Allow the onions to cook for about 10 minutes until you see some browning. Sprinkle the onions with the brown sugar and toss to combine.
• Continue to cook the onions another 15 minutes or so, stirring occasionally, allowing them to get very brown, you may need to reduce the heat to prevent burning.
• When the onions are soft (but not so soft they are mushy) and caramelized remove the pan from the stove and transfer the onions to a serving dish.

For the Beef Patties:

• If you are using an outdoor grill, pre-heat the grill and season the grill grates.
• Add the beef to a large bowl and sprinkle it with salt and pepper and mix it together with your hands. Mix it just enough to combine as over mixing will make the beef tough.
• Form the seasoned meat into four equal patties of about 4 inches in diameter that are a little thinner in the center. This will keep the patties from ballooning up.
• Place the beef patties on the grill or a hot skillet over medium-high heat. Cook the patties for about 8 minutes on the first side. Flip the patties over and add the blue cheese. Cook the patties to an internal temperature of 160° with a meat thermometer, about another 5 minutes.
• While the patties are cooking, place the brioche buns on the cooler side of the grill and toast them slightly, they should be done before the beef patties are finished cooking. Alternatively, you could toast the buns on a skillet.
• Remove the patties from the grill, spread the mayonnaise and mustard on both sides of the bun. Add the beef patties and pile on the caramelized onions and the bun top. Enjoy!

Nutrition

Serving: 1 | Calories: 1173kcal | Carbohydrates: 60g | Protein: 81g | Fat: 67g | Saturated Fat: 29g | Polyunsaturated Fat: 31g | Trans Fat: 1g | Cholesterol: 340mg | Sodium: 1347mg | Fiber: 4g | Sugar: 18g

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This post was first published on May 11, 2015. We updated the photos and left some of the old photos below.