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    Home » Recipes » Caramelized Onion Burger (that isn’t slippery!)

    Caramelized Onion Burger (that isn't slippery!)

    Sep 6, 2020 · Modified: Feb 26, 2021 by Mackenzie Ryan · This post may contain affiliate links | Disclosure policy in footer.

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    Square image of cutting board with burger on top and text saying "Not Slippery Caramelized Onion burger"

    This revolutionary way to make a caramelized onion burger completely changes your burger making routine! Juicy, flavorful, and topped with bacon, this caramelized onion burger recipe will be your new favorite!

    Two caramelized onion burgers on wooden cutting boards.

    Nothing is as frustrating as a cookout at preparing a delicious burger only to have it fall apart when picked up.

    This is typical problem with caramelized onion burgers. And they just never seem to go back together the way they originally were, like Humpty Dumpty.

    This is one of my biggest frustrations about burgers. In order for it to be fun and flavorful, it always seems to fall apart.

    If you’re ready to beat that problem, read on dear friend. I have the solution.

    What Kind Of Onion is Best?

    Since you are caramelizing the onions for this burger, it is best to go with an onion that is sweet. Sweet yellow onions are my favorite, but red and Vidalia onions work as well.

    Caramelizing onion is a bit of process, and can take up to a few hours. However, the task is easily accomplished in the amount of time it takes to preheat your grill.

    The important thing is to keep your heat low and slow so the caramelize onions dont burn

    How To Make The Paste

    To make the caramelized onion mixture for the burger, start by caramelizing the onions in skillet over medium low heat. Put in the oil, add the onions, and let them take their time to cook, stirring occasionally.

    While the onions cook, make the roasted garlic.

    Once the onions finish caramelizing, transfer them to a mixer or food processor. Add in the mustard, Worcestershire sauce, parsley, garlic, and salt and pepper. Blend until smooth.

    Next, add the paste mixture into the ground beef in a small bowl. I like to spread out the paste on either side of the beef before beginning to mix it. This helps cut down overworking the meat and making the caramelized onion burgers tough.

    After the caramelized onion paste is inside the burger, proceed to cook them on the preheated grill.

    You don't have to use a blender or food processor to do this method.  Just know that the smaller you cut your onions, the easier it is to mix it into the meat.

    Sliced onions create a fault-line in the meat that often forces the caramelized onion burgers to fall apart. The same goes for a large dice. Focus on knife skills and get the cuts as small as possible.

    caramelized onion paste inside of a blender.

    Top Recipe Tips

    • Buy a nice 80/20 mix of ground beef for burgers that stay moist. When you cook over medium high heat on a grill it sears the outside quickly. The fat both helps to to get the sear, keep it from sticking to the grill, and remain moist.
    • I recommend using a neutral flavored oil for the caramelized onions. Avocado and canola oil don't overpower the sweetness of the onions the way olive oil can.
    • Be cautious not to overuse the oil or else it makes the burgers fall apart from being too wet.
    • If grilling isn't an option, make the burgers in a cast iron pan. This gets a similar sear to the outside, just none of the grill flavor. Still an equally delicious burger.
    • If you have extra burgers leftover, reheat them under the broiler. This helps keep that moisture inside the burger and the seared outside.
    • If the internal temperature of your burgers is less than the 160°F recommended by the USDA, bacteria can grow during refrigeration. Keep this in mind with reheating, and try to cook it all the way through

    How To Cook The Burgers

    These caramelized onion burgers cook really quickly once the grill is preheated. You want to get the grill heat to medium high, or around 425°F.

    At this temperature the caramelized onion burgers only need about 4 minutes per side for a medium rare burger. And only mere minutes more for well done.

    Because of the fat in the burgers and the caramelized onion paste, the grill doesn't need brushed with oil. (However, if you chose a lower fat ratio meat, it may.) Instead, focus on not moving the burgers more than needed.

    When a spatula pushes down on a burger it pushes out all the fat and juices that keep the burger moist. The same goes with flipping it too much. Or even just lifting the burger a bit to see if the grill lines are there.

    As difficult as it tends to be, try to let the burgers rest and do their thing. Once finished and cooked to your favorite doneness, transfer the burgers to a plate and top them with the cheese.

    If the cheese goes on the burgers while still on the grill, the cheese tends to melt off the burger. Instead, let the residual heat from resting do the work for you. Then the cheese forms around the burger instead of falling off.

    a caramelized onion burger with bacon sticking out of it.

    Caramelized Onion Burger Recipe

    While I recommend adding provolone cheese, arugula, and bacon to this caramelized onion burger, any of your favorite toppings work also.

    Try adding some blue cheese, a fancy aioli or mayonnaise, or balsamic to the onions. You can even do brie, goat cheese, or mushrooms. (Although I recommend adding the mushrooms the same way as the onions.)

    For some more delicious burgers to try, I recommend:

    • Two giant basil leaves rest on top of a garlic cheeseburger.
      BBQ Brie Burger with Basil and Grilled Green Apples | #BurgerMonth
    • close up view of the thick cut bacon on the wasabi burger
      Sweet & Spicy Wasabi Burger
    • Basket of hamburger buns on a blue gingham kitchen towel.
      Homemade Brioche Hamburger Buns
    • Roasted Garlic Burger with Cambozola on a wooden cutting board next to french fries
      Roasted Garlic Burger with Cambozola | #BurgerMonth

    Make grocery shopping simpler with this printable grocery list for this not slippery caramelized onion burger recipe. Everything is listed in standard grocery store amounts. If no size is specified, even the smallest package provides more than enough.

    Happy Cooking! 🙂

    A caramelized onion burger with bacon sticking out of it.
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    Caramelized Onion Burgers

    Finally, a recipe for caramelized onion burgers that don't slide off your bun! Juicy, and flavorful, these are perfect for serving at your next cookout!
    Course: Main Course
    Cuisine: American
    Author: Mackenzie Ryan
    4 servings
    Prep Time: 1 hour hour
    Cook Time: 15 minutes minutes
    Resting Time: 30 minutes minutes
    Total Time: 1 hour hour 15 minutes minutes
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    Ingredients

    Caramelized Onion Mixture

    • 2 tablespoon neutral cooking oil, like canola or avocado
    • 2 sweet yellow onions, minced
    • 6 cloves roasted garlic, roasted
    • 2 tablespoon parsley, minced
    • 1 tablespoon Worcestershire sauce
    • 1 tablespoon whole grain mustard
    • 1 teaspoon salt
    • 1 teaspoon freshly ground pepper
    • 1 lb 80/20 ground hamburger

    Caramelized Onion Burgers

    • 4 burger buns, toasted
    • 4-8 strips of bacon, cooked
    • 1 cup arugula
    • mayonnaise, to taste
    • 4 slices Swiss or provolone cheese

    Instructions

    Caramelized Onion Mixture

    • In a heavy bottomed large skillet over medium low heat, heat oil and add in minced yellow onions. Reduce the heat to low and let the onion cook until caramelized to a golden brown- stirring occasionally - about 40 Minutes.
    • Blend together the roasted garlic cloves, caramelized onions, Worcestershire, parsley, whole grain mustard, salt, and pepper until smooth. Set aside.
    • Preheat Grill.

    Caramelized Onion Burgers

    • Using your hands, smash at least 2 heaping tablespoons of the caramelized onion mixture into the ground hamburger until completely (and as evenly as possible) combined. Try not to overwork the meat, if possible
    • Divide the mixture into four even quarters and form them into patties If possible, allow the burgers to rest for 30 minutes before cooking so the flavors can marry and the burger doesn’t get tough.
    • Grill, turning at least once, until desired doneness is reached. Place one slice of cheese on top of each patty and let melt. Remove from heat and let rest for five minutes before assembling.
    • While grill is still hot, lightly toast the buns. Coat buns with desired amount of mayonnaise.
    • Place arugula on the bottom bun (so it sticks to the mayo and is weighted down by the burger), add the burger patty, and 1-2 strips of cooked bacon on top of the burger followed by the top bun. Serve.

    Notes

    • If you have extra caramelized onion mixture leftover,  freeze it in an ice cube tray for later. Just fill each compartment with the two heaping tablespoons. Once they are frozen, break them from the ice cube tray and store in a plastic bag. It will keep like this for up to 6 months.

    Nutrition

    Serving: 1serving | Calories: 789kcal | Carbohydrates: 49g | Protein: 37g | Fat: 48g | Saturated Fat: 17g | Cholesterol: 120mg | Sodium: 1249mg | Potassium: 649mg | Fiber: 2g | Sugar: 13g | Vitamin A: 510IU | Vitamin C: 13.2mg | Calcium: 305mg | Iron: 14mg
    Tell me how much you love this recipeand show off how you made it!

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    Reader Interactions

    Comments

    1. Molly Kumar says

      May 28, 2017 at 9:04 pm

      Oh My Gosh, my hubby would totally love this burger and I'd try making it soon. We use caramalized onions a lot and to add it inside the burger (literally hidden) is awesome 🙂 and thanks for the tip on storing burgers in the fridge.

      Reply
      • Mackenzie Ryan says

        September 12, 2017 at 4:10 pm

        Hiding those onions make it so much easier to eat Molly! I hope you guys love it!

        Reply
    2. Vanessa says

      May 28, 2017 at 7:58 pm

      This sounds like a fantastic recipe! I love all your helpful tips, and mixing the onions into the meat is genius.

      Reply
      • Mackenzie Ryan says

        September 12, 2017 at 4:12 pm

        Thanks! I hope you get to enjoy these burgers soon!

        Reply
    3. Swathi says

      May 28, 2017 at 6:49 pm

      These are delicious burger, you are genius adding caramelized onion with meat for making burger sure hit. perfect burger for any out door parties.

      Reply
      • Mackenzie Ryan says

        September 12, 2017 at 4:13 pm

        Thanks, Swathi! They are always a hit at our cookouts and parties!

        Reply
    4. soniya Saluja says

      May 28, 2017 at 8:47 pm

      HUH!! Love the way think girl <3 Adding caramelized onions in the burger ... Speechless !!
      me and my family are big onion and burger fan , Cant wait to try it 😀

      Reply
      • Mackenzie Ryan says

        September 12, 2017 at 4:11 pm

        I hope you adore it Soniya!

        Reply
    5. Noel Lizotte says

      May 28, 2017 at 3:36 pm

      Carmelized Onions make anything better. Honestly, they're my favorite vegetable for that very reason. You shared some great tips here... thanks for the extra info, it makes life a lot easier when you understand things.

      Reply
      • Mackenzie Ryan says

        September 12, 2017 at 4:18 pm

        Yaaass!!! I'm always adding more caramelized onions to things!

        Reply
    6. Christine says

      May 27, 2017 at 6:10 pm

      Yum!! So perfect for the start of summer. Looks so delicious and can't wait to try out this recipe very soon!

      Reply
      • Mackenzie Ryan says

        September 12, 2017 at 4:19 pm

        It's so delicious Christine. I hope you love it!

        Reply
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