Smash Burger with Caramelized Onions
About Recipe
The sound of a chilled ball of beef hitting a scorching hot pan is a melody that never gets old. Within seconds, that signature Smash Burger aroma fills the kitchen—a mix of high-heat searing and rendering fat that promises a crust unlike any other. This isn’t your average thick patty; it’s about the Maillard reaction in its most beautiful form, creating those lacy, crispy brown edges that contrast perfectly with a center that remains incredibly juicy.
Success starts with the right meat: a 80/20 blend of ground beef, divided into cold 100g portions. When you press it flat against the pan using parchment paper and a heavy press, you’re locking in flavor while creating that addictive texture. The seasoning is simple—just a mix of salt, black pepper, paprika, and garlic powder—letting the quality of the beef shine through.
But the magic doesn't stop at the meat. We elevate the experience with a signature sauce made of mayo, ketchup, mustard, and crunchy pickles, paired with the deep sweetness of caramelized onions slow-cooked until they reach a golden jam-like consistency. Layered on a buttery toasted bun with shredded lettuce and melting Emmental cheese, every bite is a balanced explosion of savory, sweet, and tangy notes. It’s the kind of meal that reminds you why simple techniques often lead to the most extraordinary results.
Instructions
Easy steps for an amazing result
Preparation and Sauce
Divide the ground beef into 5 equal balls (approx 100g each) and refrigerate them until chilled.
To make the sauce: Mix mayonnaise, ketchup, mustard, apple cider vinegar, paprika, and grated pickled cucumbers in a bowl.
Shred the lettuce into thin strips.
Caramelizing Onions
Heat oil in a pan over medium heat, add sliced onions and a pinch of salt, and sauté until soft and yellow.
Add 1/4 cup of water and continue stirring for about 10 minutes until the onions caramelize and turn deep brown.
Cooking the Burger
Toast the burger buns in butter over low heat until golden brown.
Heat a bit of oil in a non-stick pan over medium-high heat, place a meat ball, and cover it with parchment paper.
Press down firmly on the meat ball using a flat-bottomed pan until it is thin (smash).
Season the burger with an equal-ratio mix of salt, black pepper, paprika, and garlic powder.
Cook for 2-3 minutes, then flip to sear the other side and place a cheese slice on top until melted.
Assembling the Sandwich
Spread sauce on the buns, then add lettuce, two burger patties, and the caramelized onions.
Chef Secrets
Simple tricks to make your dish special
Ensure the meat balls are very cold before placing them in the hot pan to get a crispy crust.
Smash the burger firmly to increase surface contact with the pan for the perfect color.
Serve the sandwich with crispy french fries.
Serving Suggestions
A final touch for a complete meal
Serve with a chilled glass of classic lemonade or a fizzy soda with a slice of lime to cut through the richness of the burger.
Pair your burger with crispy sweet potato fries and a side of the extra special burger sauce for dipping.
For an extra kick, garnish with pickled jalapeños and serve on a wooden board wrapped in checkered paper for a rustic burger joint feel.
Serve alongside a creamy coleslaw or a fresh green salad to add a crunch and balance the sweet flavors of the caramelized onions.
Frequently asked questions
Practical answers on prep, storage, and substitutions
Fat is the key to flavor; it keeps the burger juicy and prevents it from shrinking too much. It also helps create that signature crispy crust that defines a smash burger.
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