Croissant Smash Burgers with Caramelized Onions & Special Sauce
These croissant smash burgers combine crisp, buttery croissants with thin seared beef patties, melted cheese, caramelized onions, pickles, lettuce, tomato, and a creamy burger sauce. The result is rich, crunchy, juicy, and perfect for a weekend lunch, cookout, or indulgent dinner.
Why Croissants Work So Well for Burgers
A croissant gives this burger a softer interior and a crisp, buttery exterior. Toasting the cut sides on a hot griddle helps the pastry hold up to the beef, cheese, sauce, and vegetables without becoming soggy too quickly.
Ingredients
For the burgers
- 1 1/2 pounds ground beef, preferably 80/20
- 4 large croissants
- 4 slices American or cheddar cheese
- 1 teaspoon kosher salt
- 1 teaspoon coarse black pepper
- 1/2 teaspoon garlic powder
- 1 tablespoon neutral oil, if needed for the griddle
For the toppings
- 1 large yellow onion, thinly sliced
- 1 tablespoon butter
- 8 to 12 dill pickle slices
- 4 lettuce leaves
- 1 large tomato, sliced
- Optional: thin sliced red onion
Quick burger sauce
- 1/3 cup mayonnaise
- 2 tablespoons ketchup
- 1 tablespoon yellow mustard
- 1 tablespoon finely chopped dill pickles or relish
- 1 teaspoon pickle juice
- 1/4 teaspoon smoked paprika
Step-by-Step Instructions
- Caramelize the onions. Melt the butter on a medium-hot griddle or skillet. Add the sliced onion and a small pinch of salt. Cook for 10 to 15 minutes, stirring often, until deeply browned, soft, and sweet. Lower the heat if the onions begin to scorch.
- Toast the croissants. Slice each croissant horizontally. Place the cut sides on the hot griddle for 1 to 2 minutes until browned and lightly crisp. Remove and set aside.
- Form and smash the beef. Divide the beef into 4 loose portions. Put each portion on a very hot griddle and immediately press it into a thin patty using parchment paper between the meat and the press or spatula. Season with salt, pepper, and garlic powder.
- Sear until crusty. Leave the patties undisturbed until the edges turn brown and crisp, about 2 minutes. Scrape underneath firmly with a metal spatula, flip, and cook the second side.
- Add cheese. Place one slice of cheese on each patty immediately after flipping. Cook another 1 to 2 minutes, or until the cheese melts and the burger is cooked to your preferred doneness.
- Mix the sauce. Stir the mayonnaise, ketchup, mustard, chopped pickles, pickle juice, and smoked paprika together until smooth.
- Build the burger. Spread sauce over the toasted croissant. Add lettuce, tomato, the cheesy smash patty, dill pickles, and a generous spoonful of caramelized onions.
- Finish and serve. Add the top croissant and press very lightly so the layers settle without crushing the pastry. Serve immediately while the beef and cheese are hot.
Helpful Amazon Tools for This Recipe
Affiliate disclosure: As an Amazon Associate, I may earn from qualifying purchases made through links on this page, at no additional cost to you.
Cuisinart Burger Press
Useful for forming even burger patties before they hit the griddle.
View on Amazon
Anmarko Wide Griddle Spatula
A wide metal turner makes it easier to scrape underneath a crusty smash patty without leaving the browned surface behind.
View on Amazon
ThermoPro Instant-Read Thermometer
Useful when you want to verify the internal temperature of thicker burgers without guessing.
View on AmazonTips for Better Croissant Smash Burgers
- Use cold beef. Cold ground beef is easier to portion and gives you better browning when it meets a hot cooking surface.
- Do not overwork the meat. Keep the portions loose until you smash them on the griddle.
- Get the griddle very hot. A hot surface is what creates the dark, savory crust associated with a smash burger.
- Toast the croissant. This adds flavor and gives the bread enough structure to hold the toppings.
- Drain wet toppings. Pat tomato and pickle slices dry so the croissant stays crisp longer.
- Serve immediately. Croissants soften faster than standard burger buns once they touch hot meat and sauce.
What to Serve With It
These burgers pair well with crispy fries, onion rings, a simple green salad, grilled corn, potato wedges, coleslaw, or roasted vegetables. For a lighter plate, serve the burger with cucumber salad or a vinegar-based slaw.
Storage and Reheating
For the best texture, store the cooked patties, onions, sauce, vegetables, and croissants separately. Refrigerate the cooked beef and onions in airtight containers for up to 3 days. Reheat the patties on a skillet over medium heat, then toast the croissant separately before assembling. Avoid microwaving the fully assembled burger because the croissant can become soft and oily.
Croissant Smash Burger Recipe Card
Yield: 4 burgers | Total time: about 45 minutes
Method
- Caramelize sliced onion in butter until browned and soft.
- Toast the cut sides of the croissants.
- Place beef portions on a very hot griddle and smash thin.
- Season and sear until a dark crust forms.
- Flip, add cheese, and cook until melted.
- Mix the burger sauce.
- Layer sauce, lettuce, tomato, cheesy beef, pickles, and onions on each croissant.
- Serve immediately.
