Turkey Burger with Caramelized Onions, Gruyere and Sage Mayo

Turkey burgers are the perfect alternative to beef burgers because they are versatile and have great flavor.  I had never tried turkey burgers before and I was surprised by how tasty they were! This recipe ended up being a celebration of the end of summer and a good way to tie two seasons together. The burgers were juicy and charred, and went perfectly with the caramelized onions and smoky gruyere. I chose sweet potato fries for a side and they were really good with the burger. The sage mayo was another great accompaniment with the turkey burger as well.  The recipe is similar to last Thanksgiving’s Roasted Butternut Squash recipe with caramelized onions and gruyere. The sandwich reminded me of a summer version of Thanksgiving dinner, and just as tasty too!

Turkey Burger with Caramelized Onions, Gruyere and Sage Mayo
(Makes 5 burgers)
Printable Version


  • 5 four oz. large turkey patties (20 oz. package ground turkey)
  • 1 tbsp dijon mustard
  • 5 burger buns, lightly toasted
  • 2 large yellow onions, halved and sliced thin
  • 2 tbsp olive oil
  • 4 oz. gruyere, sliced thin
  • 2 tsp ground sage
  • 2-3 tbsp mayo
  • 1 large tomato, sliced thin
  • lettuce (optional)
  • salt and pepper to taste
  • 1 batch sweet potato fries


  1. In a saute pan, heat the olive oil and add the onions.  Cook for about 15 minutes on medium high heat until the onions have browned and started to caramelize.
  2. Meanwhile, mix the ground turkey, 1 tbsp dijon, and salt and pepper in a bowl.  Shape into large, 1/2 inch-3/4 inch thick patties.
  3. In a bowl, mix the mayo and sage together.
  4. Grill the burgers for several minutes on each side, adding slices of gruyere on top. Remove from heat when the gruyere starts to melt.
  5. On the top side of the bun, spread a thin layer of sage mayo. Place the burger on the other side of the bun and top with the onions, and tomato.
  6. Serve with the sweet potato fries and enjoy!

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