These mushroom burgers with caramelized onions gave me all the feels!I haven’t had a big fat burger in awhile, not cutting out meat or anything, but for some reason some time has passed since I enjoyed one. So how about a big beef burger, caramelized onions, the mushrooms all topped with a rosemary and black pepper mayo artisan bun. Yum, yum and yum!
I normally just do a plain beef burger, topped with just about everything I can add to it. This burger was born from a collaboration on Instagram featuring… you guessed it, mushrooms.
So, start this burger with your these lovely little fungi. I used a simple white mushroom, bought in the bulk at Costco. Slice the mushrooms for sauteing.
While I was slicing the mushrooms, I felt like caramelized mushrooms would need a place on these burgers too. They were sliced the same time.
Add the mushrooms to a hot pan with a little olive oil. I also sprinkle with salt and add a little minced garlic. Mix these occasionally. They will cook and begin to shrink substantially within 5 minutes.
I had the onions caramelizing at the same time too. Caramelize them on a medium low for at least 15-20 minutes.
Now, on to your rosemary black pepper mayo. It’s simple. Add your mayo, rosemary, black pepper and lemon juice to a small bowl and mix.
Everything else is ready, so not let’s get those burgers started!
You can grill your burgers, but I love to do mine in a cast iron skillet. Lodge is my favorite!
Time to assemble!! I bought the artisan rolls at Costco. If you want to make your own, that’s great! Add the burgers.
Layer on those caramelized onions.
Pile on those mushrooms! I promise you, they make the burger!
You can add the mayo on the top or bottom. I added mine on the top!
Top it off and it’s done!
This burger is huge. It’s intense. It isn’t for everyday, but it is so good when it does happen.
While I love these mushroom burgers with caramelized onions are amazing, I realize they are not for everyone. If you are looking for a lighter option? What about these teriyaki chicken burgers? Or if beef isn’t your thing, what about these black bean burgers?