Low-Carb Bunless Hamburgers with Garlic Aioli

This low-carb hamburger recipe ditches the traditional bun without sacrificing any of the bold, juicy flavor you love. Inspired by the keto movement and classic American grill fare, this version is wrapped in crisp butter lettuce and topped with savory garlic aioli, caramelized onions, and avocado—making it both indulgent and health-conscious. Perfect for those looking to enjoy a guilt-free burger experience with gourmet flair.

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Prep Time 25

Cook Time 15

Total Time 40

Course Main Course

Cuisine American

Servings burgers

Calories 555 kcal

Ingredients

For the Hamburgers:

1 pound grass-fed ground beef (80/20) higher fat content helps retain juiciness and flavor
1 teaspoon kosher salt
½ teaspoon freshly ground black pepper
1 tablespoon Worcestershire sauce optional, for depth of flavor
1 tablespoon olive oil for cooking

For the Garlic Aioli:

½ cup mayonnaise use avocado mayo or homemade for a cleaner flavor
2 cloves garlic finely minced or pressed
1 tablespoon lemon juice freshly squeezed preferred
¼ teaspoon salt

For the Toppings and Assembly:

1 small red onion thinly sliced and caramelized
1 medium ripe avocado sliced
8 leaves butter lettuce whole, crisp leaves for wrapping

Instructions

Prepare the Garlic Aioli: In a small bowl, whisk together the mayonnaise, minced garlic, lemon juice, and salt. Cover and refrigerate while the burgers cook to allow flavors to meld.
Caramelize the Onions: In a skillet over medium heat (about 350°F / 175°C), heat a teaspoon of olive oil and sauté the sliced red onions. Stir occasionally for 10–12 minutes, until soft and golden brown. Set aside.
Form the Patties: In a bowl, gently mix the ground beef with salt, pepper, and Worcestershire sauce. Divide into four equal portions and shape into ¾-inch-thick patties, slightly pressing a thumbprint in the center of each to promote even cooking.
Cook the Burgers: Heat a clean grill pan or skillet over medium-high heat. Add olive oil and cook patties for 4–5 minutes per side, depending on desired doneness. Aim for a deep crust and an internal temperature of 160°F (71°C).
Assemble the Burgers: On a lettuce leaf, place one cooked patty. Top with a generous dollop of garlic aioli, a few slices of avocado, caramelized onion, and another leaf of lettuce to create a 'bun.'

Notes

You may substitute ground turkey or chicken for beef—just increase the fat content with a bit of olive oil or grated onion for moisture.
For a dairy-free twist, skip cheese toppings and ensure your mayo base is dairy-free.
Short on time? Use store-bought garlic aioli, though homemade brings the deepest flavor.

Nutrition

Calories: 555kcalCarbohydrates: 9gProtein: 19gFat: 50gSaturated Fat: 12gPolyunsaturated Fat: 15gMonounsaturated Fat: 20gTrans Fat: 0.1gCholesterol: 72mgSodium: 1050mgPotassium: 713mgFiber: 4gSugar: 2gVitamin A: 1091IUVitamin C: 11mgCalcium: 42mgIron: 3mg

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