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Caramelized Onion & Mushroom Burger with Grain Free Bun

  • Author: Kelsey




  • 1 box Simple MIlls Artisan Bread Mix
  • 1 tablespoon olive or avocado oil
  • ¼ cup unsweetened applesauce
  • 2 eggs
  • 1 tablespoon dried minced onion
  • 1 additional egg for egg wash


  • 1 pound grass fed ground beef
  • 1 tablespoon olive or avocado oil
  • 1 yellow onion, sliced thinly
  • 2 cups sliced mushrooms
  • 1 teaspoon coconut aminos
  • Salt and pepper
  • Avocado
  • Mayonnaise


  • Preheat oven to 350 degrees and line a baking sheet with parchment paper.
  • In a medium sized bowl combine Simple Mills Artisan Bread Mix, oil, applesauce and eggs and stir until combined.
  • Separate dough into 4 or 5 pieces (depending on how big you want your buns)
  • Dab a little bit of water in your hands and roll each dough ball in your hands then place it on the baking sheet and press down just a little.
  • Crack the extra egg in a small bowl and stir to combine.  Take a pastry brush or BBQ brush and brush a little egg wash onto the the dough balls. This will help it get nice and golden brown.  Then sprinkle each with a little dried minced onion.
  • Bake buns for 25 minutes.
  • While the buns bake start on the toppings.  Place a large skillet over medium heat and add 1 tablespoon of oil to the pan. Then add sliced onions and cook, stirring occasionally for 5 minutes.  Once they start to soften add sliced mushrooms, stir, and place a lid on top for 10 minutes, stirring occasionally.
  • Once they are nice and caramelized add in coconut aminos and season with salt and pepper.
  • To make burgers, divide the pound of meat into 4 even pieces and form them into patties.  Sprinkle each side with salt and pepper and cook on a hot grill or stovetop for about 3-5 minutes per side depending on how you like your burger cooked.
  • To assemble the burger, slice your bun in half and on the bottom put some mayonnaise, the patty, avocado, onion mix and top with the other half of the bun.