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Two thin, aggressively seasoned beef patties smashed until crispy on screaming-hot cast iron, draped with melty pepper jack, and dressed with a spicy Creole sauce that reminds you where you are: Louisiana, where we don't do anything halfway.
Asmash burger is nothing but technique and confidence. You take a ball of seasoned beef, you press it flat against iron so hot it could brand cattle, and you let the Maillard reaction do its magic. Those craggy, lacey edges that get almost burnt? That's not a mistake. That's the whole point.
At Lagniappe, we started serving these on Friday nights about ten years back, when the smash burger craze was sweeping the country. But we couldn't just make a plain burger. That's not who we are. So we hit the beef with Cajun seasoning, built a Creole sauce with mustard and horseradish and a good hit of cayenne, and put pepper jack on top because Louisiana runs on heat. The regulars went wild. Now it's one of our best sellers.
The secret is building flavor at every step. Season the beef before you portion it. Season again when it hits the griddle. The Creole sauce brings acid and heat. The pepper jack brings richness and more heat. The pickles cut through the fat. By the time you take a bite, you've got five or six layers of flavor working together. That's what separates cooking from just making food.
You don't need fancy equipment. A cast iron skillet and a sturdy spatula will do just fine. What you need is heat, you need seasoned beef, and you need to commit to the smash. Press hard and don't second-guess yourself. Trust the process. When those edges go dark and crispy and the cheese starts melting down the sides, you'll know you did it right.
Quantity
1 1/4 pounds
Quantity
2 tablespoons
divided
Quantity
1 teaspoon
Quantity
8 slices
Quantity
4
Quantity
2 tablespoons
softened
Quantity
for topping
Quantity
for topping
thinly sliced
Quantity
for topping
shredded
Quantity
1/2 cup
Quantity
2 tablespoons
Quantity
1 tablespoon
Quantity
2 teaspoons
Quantity
1 teaspoon
Quantity
1/2 teaspoon
Quantity
1/4 teaspoon
Quantity
1/4 teaspoon
| Ingredient | Quantity |
|---|---|
| ground beef (80/20 blend) | 1 1/4 pounds |
| Cajun seasoningdivided | 2 tablespoons |
| kosher salt | 1 teaspoon |
| pepper jack cheese | 8 slices |
| soft brioche or potato buns | 4 |
| unsalted buttersoftened | 2 tablespoons |
| dill pickle chips | for topping |
| white onionthinly sliced | for topping |
| iceberg lettuceshredded | for topping |
| mayonnaise | 1/2 cup |
| Creole mustard | 2 tablespoons |
| Louisiana hot sauce | 1 tablespoon |
| prepared horseradish | 2 teaspoons |
| Worcestershire sauce | 1 teaspoon |
| smoked paprika | 1/2 teaspoon |
| garlic powder | 1/4 teaspoon |
| cayenne pepper | 1/4 teaspoon |
Whisk together the mayonnaise, Creole mustard, hot sauce, horseradish, Worcestershire, smoked paprika, garlic powder, and cayenne in a small bowl. Taste it. The sauce should have a kick that builds slowly, not a punch that knocks you down. Adjust the cayenne if you want more heat, add a splash more hot sauce for vinegar brightness. Set aside. This sauce gets better as it sits, so make it first and let those flavors get acquainted.
Mix one tablespoon of Cajun seasoning and the kosher salt into the ground beef using your hands. Work it gently, just enough to distribute the spices. Overworking makes tough burgers. Divide the meat into eight equal portions, about two and a half ounces each. Roll each portion into a loose ball. Do not pack them tight. You want the beef relaxed, ready to smash flat without fighting back.
Set a large cast iron skillet or flat griddle over high heat for a full five minutes. This is not negotiable. You need the surface hot enough that a drop of water vaporizes on contact, not sizzles, but disappears instantly. That's the bayou way: screaming hot iron is what creates the lacey, crispy edges that make a smash burger worth eating.
Place two beef balls on the hot surface, leaving plenty of space between them. Immediately press each one flat using a sturdy metal spatula or burger press. Push down hard and hold for ten seconds. You want those patties thin as a playing card, with craggy edges spreading outward. The meat should sizzle and pop the moment it hits the iron. Sprinkle the remaining Cajun seasoning over the tops of the patties while the bottoms develop their crust.
Cook without moving for two to two and a half minutes. The edges will turn deep brown, almost black in spots, with lacy, crispy bits where the fat has rendered and crisped. This is what you want. When you see the crust creeping up the sides and the top surface losing its raw pink color, flip the patties. The underside should look like a beautiful, craggy moonscape of golden brown and char. Immediately lay a slice of pepper jack on each patty. The residual heat will start the melt.
Cook the second side for just sixty to ninety seconds. The patties are thin, so they cook fast. Remove to a plate and repeat with the remaining beef balls. While the second batch cooks, butter your bun halves and toast them in a clean spot on the griddle until golden, about thirty seconds.
Spread a generous tablespoon of Creole sauce on each bun half. Do not be shy. Layer shredded lettuce on the bottom bun, then stack two patties with their melted cheese. Top with pickle chips and thin onion slices. Crown with the top bun and press gently. The burger should compress slightly, the sauce mixing with the meat juices. Serve immediately while the cheese is still soft and the edges still have their crunch.
1 serving (about 340g)
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