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Simple Caramelized Onion Smash Burgers. recipe photo

Caramelized Onion Smash Burgers.

These Caramelized Onion Smash Burgers are packed with flavor! Juicy beef patty topped with sweet caramelized onions and herb mayo will impress everyone.
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Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings: 4 servings
Course: Main Course
Cuisine: American
Ingredients Equipment Method Notes

Ingredients
  

For the Caramelized Onions:
  • 2 medium sweet onions thinly sliced
  • 4 tablespoons unsalted butter
  • 1 pinch salt
For the Burgers:
  • 1 pound lean ground beef (93% lean)
  • 1 teaspoon salt
  • 1/2 tablespoon canola or vegetable oil
  • 1 tablespoon unsalted butter for cooking patties
  • 4 slices sharp cheddar cheese
  • 4 pieces St Pierre Brioche Burger Buns
  • Leafy green lettuce
For the Herb Mayo:
  • 1 cup mayonnaise
  • 2 tablespoons chopped basil
  • 2 tablespoons chopped parsley
  • 1 tablespoon chopped rosemary
  • 2 cloves garlic minced
  • Freshly cracked black pepper to taste

Equipment

  • Large skillet or griddle
  • Spatula
  • Mixing bowl
  • Knife and cutting board
  • Meat thermometer (optional)

Method
 

Cooking Instructions:
  1. Step 1: Caramelize the Onions - Heat 2 tablespoons of butter in a large skillet over medium heat. Add onions and salt, cooking for 20-25 minutes until golden brown.
  2. Step 2: Prepare the Herb Mayo - In a bowl, mix mayonnaise with basil, parsley, rosemary, and garlic. Season with black pepper to taste.
  3. Step 3: Shape the Beef - Form the ground beef into four equal portions without overworking the meat.
  4. Step 4: Smash and Cook the Burgers - Heat oil in the skillet over high heat. Smash each beef portion down to create a thin patty. Season with salt and cook for 3-4 minutes.
  5. Step 5: Add Cheese - After flipping, add butter and cheese to each patty. Cover to melt cheese for 2-3 minutes.
  6. Step 6: Toast the Buns - Slice buns and toast them until golden brown.
  7. Step 7: Assemble the Burgers - Spread herb mayo on the bottom bun, add lettuce, patty, caramelized onions, and the top bun.
  8. Step 8: Serve and Enjoy! - Serve hot with your favorite sides!

Notes

  • Use a meat thermometer for perfect doneness.
  • Try different cheese varieties for added flavor.
  • Store leftovers in an airtight container for up to 3 days.