Are you ready to elevate your burger game with a bold and spicy twist? Look no further than this Jalapeño-Onion Smash Burger recipe! With a perfect balance of heat from fresh jalapeños and sweetness from caramelized onions, these burgers deliver a burst of flavor that’s sure to impress at your next cookout or family dinner.
Whether you’re hosting a backyard barbecue or simply craving a tasty and satisfying meal, these smash burgers offer a unique take on the traditional beef patty. Keep reading for step-by-step instructions and helpful tips for creating the ultimate Jalapeño-Onion Smash Burgers that will have everyone asking for seconds.
Ingredients You’ll Need
To create the perfect Jalapeño-Onion Smash Burgers, you’ll need a few essential ingredients that combine for a mouthwatering, flavorful burger experience:
For the Smash Burgers:
- 1 pound ground beef (80% lean, 20% fat)
- 1 tablespoon olive oil (for cooking)
- 4 hamburger buns (preferably brioche or your favorite type)
- 1 teaspoon salt
- 1 teaspoon freshly ground black pepper
- 2 tablespoons mayonnaise
- 1 tablespoon mustard (optional)
- 2 slices of American cheese (or cheese of your choice)
- Pickled jalapeños (optional, for added spice)
For the Jalapeño-Onion Topping:
- 1 large onion, thinly sliced
- 1 tablespoon olive oil
- 2 fresh jalapeños, thinly sliced
- 1 teaspoon sugar (optional, for caramelizing the onions)
- Salt and pepper to taste
Step-by-Step Instructions

1. Caramelize the Onions
Start by caramelizing the onions to bring out their natural sweetness. Heat a tablespoon of olive oil over medium-low heat in a skillet. Add the sliced onions and sauté, stirring occasionally, until they turn golden and soft—this should take about 20 minutes. Add the sugar halfway through cooking to help speed up the caramelization process. Once the onions are ready, stir in the sliced jalapeños and cook for an additional 2-3 minutes until the peppers soften and release their heat.
2. Prepare the Smash Burgers
While the onions and jalapeños are cooking, it’s time to form the burger patties. Divide the ground beef into 4 equal portions, about 4 ounces each. Roll each portion into a ball. Heat a griddle or large skillet over medium-high heat and drizzle with olive oil.
Once the pan is hot, place the beef balls in the pan and immediately smash them down with a spatula or burger press to create a thin patty. Season each patty generously with salt and pepper. Cook for about 2 minutes until a golden-brown crust forms, then flip the patty and add a slice of cheese to melt.
3. Toast the Buns
While the burgers are cooking, toast your buns. You can do this by placing them, cut-side down, in a separate skillet or griddle over medium heat until golden and slightly crispy, about 2 minutes.
4. Assemble the Burgers
Once the patties are cooked, it’s time to assemble your Jalapeño-Onion Smash Burgers. Spread a layer of mayonnaise (and mustard, if desired) on the bottom of each toasted bun. Place the cheesy smash burger patty on the bun, then top with the caramelized jalapeño-onion mixture. Add pickled jalapeños for an extra kick if desired.
Place the top bun on the assembled burger and press down gently to secure everything in place.
5. Serve and Enjoy
Your Jalapeño-Onion Smash Burgers are now ready to be served! Pair them with your favorite side dishes, like crispy fries, a fresh salad, or some creamy coleslaw, and enjoy the bold flavors that come from the combination of spicy jalapeños and sweet onions.
Tips for the Perfect Smash Burger
- Use high-quality beef: For the juiciest and most flavorful burgers, choose ground beef with a good fat ratio (80% lean, 20% fat) to keep your burgers tender and moist.
- Smash the burgers: The secret to a great smash burger is to press the beef down firmly once it hits the pan, creating a thin patty with crispy edges.
- Customize your toppings: While this recipe features caramelized onions and fresh jalapeños, feel free to add your favorite burger toppings like lettuce, tomato, avocado, or bacon.
- Adjust the heat: If you love spice, leave the seeds in the jalapeños for an extra fiery punch. For a milder option, remove the seeds before adding them to the burger.
Why You’ll Love Jalapeño-Onion Smash Burgers
These Jalapeño-Onion Smash Burgers offer the perfect blend of textures and flavors, with crispy edges on the burger patties, sweet and spicy toppings, and soft, toasted buns. Whether you’re looking to impress guests at your next cookout or indulge in a satisfying meal at home, this burger recipe is sure to be a hit!
Serving and Storage Tips for Jalapeño-Onion Smash Burgers
Serving Tips
- Side Pairings: These Jalapeño-Onion Smash Burgers are perfect when paired with crispy sides that complement their bold flavors. Consider serving them with:
- Crispy French fries or sweet potato fries.
- A refreshing coleslaw to balance the heat.
- A grilled vegetable medley, such as zucchini, bell peppers, and asparagus, to add a light and healthy touch.
- A cold beer or spicy margarita to enhance the spicy kick of the jalapeños.
- Burger Variations: If you want to mix things up, try adding unique toppings or different cheese varieties to customize your burger:
- Swap the American cheese for cheddar, pepper jack, or even blue cheese for a more intense flavor.
- Add crispy bacon or fried egg for extra richness.
- Top with avocado slices or a spicy mayo for a creamy finish.
- Serving Style: Serve your Jalapeño-Onion Smash Burgers on a large platter for family-style meals or individually wrapped in parchment paper for easy grab-and-go meals during picnics or BBQs.
Storage Tips
- Storing Leftover Burgers:
- If you have leftover cooked patties, store them in an airtight container in the refrigerator for up to 3 days. Make sure to separate the burger patties with parchment paper or wax paper to prevent them from sticking together.
- For the caramelized onions and jalapeños, store them in a separate airtight container in the fridge. They can be kept for about 4-5 days.
- Freezing for Later:
- If you want to keep your smash burgers for a longer time, you can freeze the patties and toppings separately.
- Place cooked, cooled patties in a freezer-safe bag or container. They will stay fresh for up to 3 months. To reheat, simply place them in a skillet or on the grill for a few minutes until warmed through.
- For the caramelized onions and jalapeños, allow them to cool, then freeze in a freezer-safe container. When ready to use, reheat in a skillet until warmed.
- Reheating Tips:
- To reheat the burgers, it’s best to use a skillet or grill to bring back some of the crispy texture of the smashed patties.
- If you’re reheating the onions and jalapeños, sauté them in a small amount of oil over medium heat until warmed through.
By following these serving and storage tips, you can enjoy your Jalapeño-Onion Smash Burgers not only on the day they’re made but also as delicious leftovers or even as part of a meal prep plan!
1. Can I make the caramelized onions and jalapeños ahead of time?
Yes! You can prepare the caramelized onions and jalapeños ahead of time. Store them in an airtight container in the refrigerator for up to 4-5 days. They can be reheated in a skillet when you’re ready to assemble the burgers.
2. What type of beef is best for smash burgers?
For the juiciest smash burgers, it’s recommended to use ground beef with an 80% lean to 20% fat ratio. This ensures the burgers stay flavorful and juicy while cooking, giving you that perfect crispy edge with a tender interior.
3. Can I make the patties ahead of time?
Yes, you can make the burger patties in advance! Form the patties, then cover and refrigerate them for up to 24 hours before cooking. This can help the flavors meld together and save time on the day of cooking.
4. How can I make these burgers less spicy?
If you prefer a milder version of these Jalapeño-Onion Smash Burgers, you can remove the seeds and membranes from the jalapeños before adding them to the onions. Additionally, you can skip the pickled jalapeños and opt for a milder cheese, like mozzarella or cheddar, to tone down the heat.
PrintJalapeño-Onion Smash Burgers
These Jalapeño-Onion Smash Burgers are packed with bold, spicy flavor and caramelized goodness. Perfectly seared ground beef patties are smashed onto the griddle with jalapeños and onions for a crispy, juicy, and mouthwatering burger experience.
- Prep Time: 10 minutes
- Cook Time: 10 minutes
- Total Time: 20 minutes
- Yield: 4 burgers 1x
- Category: Main Course
- Method: Grilling or Skillet
- Cuisine: American
- Diet: Halal
Ingredients
- 1 pound ground beef (80/20 blend recommended)
- 1/2 cup thinly sliced jalapeños (fresh or pickled)
- 1 small onion, thinly sliced
- Salt and black pepper to taste
- 4 slices cheddar cheese
- 4 burger buns, toasted
- 2 tablespoons butter or oil for cooking
- Optional toppings: lettuce, tomato, pickles, mayo, ketchup
Instructions
- Preheat a cast-iron skillet or griddle over medium-high heat and lightly grease with butter or oil.
- Divide ground beef into 4 equal portions and shape into loose balls (do not overwork).
- Place sliced onions and jalapeños in small piles on the skillet and top each with a ball of beef.
- Smash each beef ball flat with a spatula, pressing it into the onions and jalapeños. Season with salt and pepper.
- Cook for 2-3 minutes until the edges are crispy and the onions/jalapeños are caramelized.
- Flip the patties, add a slice of cheese on each, and cook another 1-2 minutes until cheese is melted and patties are cooked through.
- Assemble burgers on toasted buns with desired toppings.
- Serve immediately while hot and juicy.
Notes
- Use a heavy spatula or burger press to get a good sear.
- Pickled jalapeños add tang while fresh bring more heat — choose based on your spice level preference.
- Double up on patties for a more indulgent burger.
Nutrition
- Serving Size: 1 burger
- Calories: 520
- Sugar: 5g
- Sodium: 610mg
- Fat: 32g
- Saturated Fat: 13g
- Unsaturated Fat: 16g
- Trans Fat: 1g
- Carbohydrates: 30g
- Fiber: 2g
- Protein: 30g
- Cholesterol: 90mg