This revolutionary new way to make a caramelized onion burger will completely change your burger making routine! Juicy, flavorful, and topped with bacon; this caramelized onion burger recipe will be your new favorite!
Note: This post was updated with new content on July 16, 2018 for your enjoyment!
There it is, sitting on the tray – a gorgeous cheeseburger with the aroma of heaven wafting from it. You grab your bun, top it with some delicious condiments and make your way over to the toppings. A veritable (and literal) smorgasbord of fun lays out in front of you – lettuce, tomato, onion, and maybe, if your host is adventurous, bacon, mushrooms, or bleu cheese.
“OH GOODNESS GRACIOUS – GET IT IN MY MOUTH NOW!“, you think. You collect the last of your ingredients, add your scrumptious patty (and maybe a few side dishes end up on the plate – but let’s be honest, we know where your priorities are) and sit down. As you start to eat, mouthfuls of fragrant and flavorful meaty glory roll around your tongue, distracting you from all the troubles of the world. Suddenly you look down to notice that your patty is sliding off your bun, taking with it most of the toppings as well. You try with all your might to catch it, and hold it in your bun-prison, but before you can yell out a loud “Noooooo!!!!!”.
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…
Skills & Techniques
To really master this caramelized onion burger recipe, here are some culinary skills I recommend reading up on:
- How To Buy & Store Ground Beef. This explains the different lean-to-fat ratios of hamburger and what each is best for.
- How to Roast Garlic. Make perfectly roasted garlic at home with this simple tutorial.
- Buying & Storing Fresh Herbs. There is a trick for keeping parsley fresh for a long time.
- How To Make Your Own Mayonnaise. It’s 10x better homemade!
- How To Broil. This is absolutely the best way for reheating leftover grilled burgers!
- Understanding USDA Beef Grades. Find out if the USDA grade is worth the price.
To store any leftover burgers that you may have, keep them in a single layer (if they have cheese on them) in a shallow, airtight dish. They will stay fresh in the refrigerator like this for up to 5 days, but the longer they sit the drier they will become. Make sure to keep the patties separate from the buns and toppings for best storage results. NOTE: If you cooked your burgers to less than the 160°F internal temperature recommended by the USDA, your caramelized onion burgers run a risk of bacterial growth during refrigeration. If this concerns you, you can always crumble your leftovers and add turn them into tacos, lasagna, or spaghetti meat. Reheating them this way will help ensure they are completely cooked through. To store any leftover caramelized onion mixture, see the notes in the recipe.
If you decide to reheat your caramelized onion burger as it is, I recommend:
- Place a rack in the top third of your oven and preheat the broiler to high.
- Put the caramelized onion burgers in a single layer on a baking rack inside of a sheet pan lined with aluminum foil. The foil makes cleanup easier.
- Place the burgers in the oven near the broiler and cook for 2 minutes. Remove the sheet pan, flip the burgers, return them to the oven and cook for another 2 minutes.
- Remove the burgers from the broiler, place on your buns with fresh toppings and serve.
I recommend using the broiler because, like grilling, the quick cooking of the outside help keep the inside juicy. Be warned though, consuming raw or undercooked meat may have consequences. The USDA recommended internal temperature for ground beef is 160°F for killing of any potentially harmful bacteria.
Caramelized Onion Burger Recipe
While any type of onion can caramelize well, the best onion for burgers (in my opinion) is a sweet yellow onion. A Walla-Walla onion, if you can find them, is best! The onions are caramelized through a process of slow sweating, usually in a neutral oil (olive oil changes the flavor).
As if the slipperiness of the oil isn’t enough – the onions have been sweating! Think of how slick you become after a good run or bicycle ride. Now picture yourself lightly coated in baby oil – that’s the problem we’re working with. So, how can you create a caramelized onion burger without the slip & slide action? Ah-Ha! Let’s mix it INTO the meat! In order to give our caramelized onion burger the best flavor possible, we are going to take all those ingredients that may slip and slide around, and blend them into a paste. That paste will then get mixed into our burger.
One thing I would like to point out really quickly is that 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. If you were to use sliced onions (like I did the first time), you’ll end up creating a fault-line in the meat that will make it more susceptible to falling apart as you cook and eat your caramelized onion burger. This goes the same for a larger dicing of the onions. Make sure to really use your knife skills and get the cuts as small as possible.
Get your free printable grocery list for this Not-Slippery Caramelized Onion Burger recipe HERE.
This grocery list has everything that you’ll need to make this Caramelized Onion Burger recipe. To help in making grocery shopping simple, each ingredient is listed in easy-to-find grocery store amounts. If there is no amount specified, that means that you can buy the smallest (or largest) container available and still have plenty left over.
Happy Cooking! 🙂
Caramelized Onion Burgers
Caramelized Onion Mixture
- 2 tbsp neutral cooking oil, , like canola or avocado
- 2 sweet yellow onions, , minced
- 6 cloves garlic, , roasted
- 2 tbsp parsley, , minced
- 1 tbsp worcestershire
- 1 tbsp whole grain mustard
- 1 tsp salt
- 1 tsp freshly ground pepper
Caramelized Onion Burgers
- 1 lb 80/20 ground hamburger
- 4 buns, , toasted (pub-style if you can find them)
- 4-8 strips of bacon, , cooked
- 1 cup arugula
- mayonnaise, , to taste
- 4 thin slices swiss or provolone cheese
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 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 2 Minutes. Add cheese if desired.
- 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 (so it sticks to the mayo and the cheese), followed by the top bun. Enjoy.