We love burgers and eat them all the time in our home. I truly believe that really good burgers don’t have a ton of ingredients. Especially when you buy higher quality beef. When I make burgers, I want the natural flavor of the beef to stand out, so I don’t add a lot of seasonings. The most complicated part about this recipe is the caramelized onions (and they aren’t complicated at all). They add such a beautiful sweet flavor that pairs perfectly with the beef.
Okay, let’s talk about caramelized onions. They are so easy to make, but they do take a little patience. They cook over low heat and the onions release their natural sugars to create that yummy caramel flavor that we all love. I cook them in a mix of avocado oil and ghee. If you are not doing a round of Whole 30, I also love to use grass fed butter (like KerryGold). Once the onions are done caramelizing, I let them cool completely and then it is time to stuff the burgers.
I know that a lot of recipes will have you adding breadcrumb and egg to the patty mixture, and they do have their place sometimes. But I prefer to just used the ground beef and seasonings. I form 12 equal sized patties with my hands and then season them with a simple mixture of salt, pepper, garlic powder and paprika. I place the a little of the onion mixture in the middle of one patty and then place another patty on top of that. Using my hands, I re-form it to shape a new patty.
These are big ol’ burgers so you want to make sure to cook them properly. My favorite way to do this without sacrificing flavor, is by starting off in a super hot cast iron skillet. This gets a lovely crust on the outside and then they can be transferred to the oven right in the skillet to finish cooking. It works every time.
We eat our burgers on a lettuce bun to keep them gluten free and Whole 30 compliant. I always make a little spread of toppings so that the family can customize their own. My Spicy Garlic Aioli is the sauce in the picture and I always make it for our burgers. It is so easy and so delicious.
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Caramelized Onion Stuffed Burgers
- 2 lbs Ground Beef
- 3 Yellow Onions Large
- 2 Tbls Avocado Oil divided
- 1 Tbls Ghee
- 2 tsp Salt divided
- 1 tsp Pepper divided
- 1 tsp Garlic Powder
- 1 tsp Paprika
- 1 clove Garlic minced
- Pre-heat the oven to 375'
- In a large mixing bowl, add in the ground beef, 1 tsp of salt, and 1/2 tsp pepper. Mix to combine and form into 12 equal sized patties. Place the formed patties onto a lined baking sheet in the fridge
- Thinly slice all 3 yellow onions. Heat 1 Tbls of the avocado oil and the ghee in a large cast iron skillet over medium low heat. Add in the onions and let cook (stirring occasionally) until slightly brown and caramelized (about 15-20 minutes) When done, turn off the heat and stir in the minced garlic. Remove from pan and let cool completely
- Take the patties out of the fridge and season the outside with remaining salt & pepper, garlic powder, and paprika. Place about 1 Tbls of the onions in the center of 6 of the patties and use the other 6 patties on top. Use hands to form back into full size patties with the onions on the inside
- Add remaining avocado oil to the cast iron skillet and bring to medium/high heat. Once hot, place the burgers in the skillet and cook on each side for 4 minutes. Then place the skillet in the oven to finish cooking. Cook to your preference. I like mine medium rare, and that took about 10 minutes in the oven.