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Pesto Burgers with Caramelized Onions and Mushrooms

The ultimate burger! Pesto sauce, caramelized onions and mushrooms yield the most incredible flavors here!

Prep Time
20 mins
Cook Time
1 hr
Total Time
1 hr 20 mins
Servings: 4 burgers
Calories: 629 kcal
Cuisine: American

Ingredients

Caramelized Onions and Mushrooms
  • 2 tablespoons avocado oil or olive oil
  • 2 large yellow onions thinly sliced
  • 1/4 teaspoon sea salt
  • 2 cups baby bella mushrooms chopped
Burger Meat:
  • 1 1/2 pounds ground beef
  • 1/2 teaspoon sea salt
  • 1/2 teaspoon garlic powder
  • 1/2 teaspoon onion powder
Basil-Walnut Pesto:
  • 2 cups fresh basil
  • 1/2 cup raw walnuts
  • 1/4 teaspoon sea salt to taste
  • 1/3 cup olive oil
For Serving:
  • 4 to 6 burger buns
  • Sautéed Kale optional

Instructions

Prepare the Caramelized Onions and Mushrooms:
    Cup of Yum
  1. Add the oil to a large non-stick skillet and heat to medium. Add the onions and cook, stirring occasionally, until onions begin to brown on the edges, about 15 minutes. Reduce the heat to medium-low and continue cooking, stirring occasionally, until onions are dark brown and caramelized, about 40 minutes. Add a small amount of water twice throughout the cooking process to deglaze the pan when the onions begin sticking. 
  2. Once the onions are almost fully caramelized, add the mushrooms. Continue cooking until onions are a deep brown color and mushrooms have leached mush of their liquid, have softened, and have a golden-brown sear on them.
Prepare the Pesto Sauce:
  1. While the onions are caramelizing, make the pesto sauce and prepare the burgers. Add the basil, walnuts, and sea salt to a food processor and pulse until chopped. Leave the food processor on while streaming the oil through the top. Taste for flavor and add more sea salt or oil as desired. Set aside until ready to use.
Make the Burgers
  1. Add the ground meat to a mixing bowl along with the sea salt, onion powder, and garlic powder. Mix well with your hands. Form 4 to 6 burger patties (according to your size preference).
  2. Add 1 to 2 tablespoons of avocado oil (or cooking oil of choice) to a large cast iron skillet and heat to medium-high. Once the skillet is fully hot, carefully place the burger patties on the surface. Cook until deep brown char marks appear, about 3 to 5 minutes. Carefully flip and continue cooking to desired doneness, another 2-3 minutes for medium-rare, 5 minutes for medium, and 7 to 8 minutes for well-done.
Prepare the burgers:
  1. Toast your burger buns (if desired), then add sauteed kale (or green of choice), a burger patty, pesto sauce, and caramelized onions and mushrooms. Sink your teeth in, and enjoy.

Nutrition Information

Serving 1Burger Calories 629kcal (31%) Carbohydrates 21g (7%) Protein 45g (90%) Fat 41g (63%) Fiber 2g (8%) Sugar 3g (6%)

Nutrition Facts

Serving: 4burgers

Amount Per Serving

Calories 629

% Daily Value*

Serving 1Burger
Calories 629kcal 31%
Carbohydrates 21g 7%
Protein 45g 90%
Fat 41g 63%
Fiber 2g 8%
Sugar 3g 6%

* Percent Daily Values are based on a 2,000 calorie diet.