Jalapeño-Onion Smash Burgers
The Perfect Burger Adventure Awaits!
Picture this: a burger that oozes juiciness, packs a spicy kick, and transports your taste buds to flavor town. Yep, we’re diving into the world of Jalapeño-Onion Smash Burgers! These bad boys are not your average patties; they boast a flavor combo that’s downright irresistible. Plus, they come together in a matter of minutes, so you’ll be the grilling guru in no time!
Why Make This Recipe
Who doesn’t love a meal that combines ease with heaps of flavor? These burgers come with a few serious perks that make them a must-try:
- Quick and Easy: Feel like a pro chef in under 30 minutes, even if you’re still wearing your PJs.
- Family-Friendly: A little spice, a lot of yum—perfect for both adventurous eaters and picky kids alike.
- Minimal Cleanup: One pan and a couple of bowls? Easy peasy!
Ingredients
You don’t need fancy stuff — just these basics!
- 3 tablespoons mayonnaise
- 1 1/2 tablespoons ketchup
- 1 teaspoon Worcestershire sauce
- 1/2 teaspoon black pepper
- 1/4 teaspoon garlic powder
- 1/4 teaspoon kosher salt
- 1 1/2 pounds high-quality 80% lean ground beef
- 1 teaspoon canola oil
- 1 large yellow onion, very thinly sliced (about 2 cups)
- 1 large jalapeño chile, very thinly sliced (about 1/2 cup)
- 1 1/4 teaspoons kosher salt, divided
- 3/4 teaspoon black pepper, divided
- 4 American cheese slices
- 4 soft hamburger buns, split and toasted
Directions
Ready to bring these burgers to life? Follow these simple steps:
- In a small bowl, stir together all burger sauce ingredients. Cover and chill until you need it.
- Divide the beef into 8 (3-ounce) portions and shape each one into a loose ball. Chill while preparing the grill.
- Cut a 3-inch square of parchment paper and set aside. Preheat your grill to high (450°F to 500°F), placing a large cast-iron skillet or griddle on it.
- Drizzle the skillet with oil. Place onion slices in 8 small mounds on the skillet, spacing at least 2 inches apart. Top with sliced jalapeños and sprinkle with 1/2 teaspoon salt and 1/4 teaspoon pepper. Cook undisturbed until onions begin to brown (30 seconds to 1 minute).
- Place one meatball on each onion mound, press down with the parchment paper, and flatten into a 4-inch-wide patty. Remove parchment and repeat.
- Sprinkle the smashed patties with remaining salt and pepper. Cook until they start to crisp (2 to 3 minutes).
- Flip patties to have the onion-jalapeño mixture on top and add a slice of cheese to 4 of them. Cook until well browned and cheese melts (1 minute and 30 seconds to 2 minutes).
- Stack each cheese-covered patty on a plain patty to create 4 double stacks. Transfer to the bottom bun and spread about 1 tablespoon of burger sauce on each top bun. Place them on top and serve right away.

How to Make Jalapeño-Onion Smash Burgers (Overview)
Let’s break it down! You’ll mix up a killer burger sauce, shape your beef, and let the grill do its magic. Pro tip: keep your meatballs chilled while prepping. It helps them stay juicy! And remember, the key to that smash is to really press down with a sturdy spatula. Who doesn’t love that crispy crust?
How to Serve Jalapeño-Onion Smash Burgers
Serve these beauties with a side of crispy fries or a vibrant coleslaw for a color pop! Drizzle a bit more of that creamy burger sauce on top for an extra flavor hug. You’ll love the crunch of the toasted buns against the greasy, cheesy burgers—yum! Don’t be surprised if the aroma draws your neighbors over for a taste!
How to Store Jalapeño-Onion Smash Burgers
Got leftovers (if you’re lucky!)? Store them in the fridge for up to 3 days. Just make sure to wrap them tightly so they don’t dry out. Need to reheat? Pop them in the skillet for that fresh-off-the-grill taste! If you want to be super organized, these can be made-ahead and then frozen for later, too. Just thaw and reheat when the craving hits!
Tips to Make Jalapeño-Onion Smash Burgers
- Chill your beef: Keeping beef cold before grilling helps it hold its shape and juiciness.
- Don’t skip the parchment: It makes smashing easier without sticking, plus you get nice, even patties.
- Customize your cheese: Feel free to swap in your favorite cheese—smoked cheddar is a tasty option!
- Slice your onion thinly: This ensures even cooking and maximizes flavor.
- Experiment with toppings: Avocado slices, crispy bacon, or even some spicy aioli could be great additions.
Variation
Want a lighter twist? Go for ground turkey or chicken instead of beef. Want it vegan? Simply replace the meat with your favorite plant-based beef alternative and skip the cheese for a deliciously satisfying meal that even meat lovers will enjoy.
FAQs
Can I make these burgers ahead of time?
Absolutely! Just form the patties and chill them until you’re ready to grill.
What if I can’t find jalapeños?
No worries! Opt for a milder pepper or even a dash of hot sauce for that spicy kick.
Can I freeze the cooked burgers?
You bet! Cooked burgers can last about 3 months in the freezer. Just reheat when desired.
📌 Pin this recipe for your next cozy dinner night!

Jalapeño-Onion Smash Burgers
Ingredients
Method
- In a small bowl, stir together all burger sauce ingredients. Cover and chill until you need it.
- Divide the beef into 8 (3-ounce) portions and shape each one into a loose ball. Chill while preparing the grill.
- Cut a 3-inch square of parchment paper and set aside. Preheat your grill to high (450°F to 500°F), placing a large cast-iron skillet or griddle on it.
- Drizzle the skillet with oil. Place onion slices in 8 small mounds on the skillet, spacing at least 2 inches apart. Top with sliced jalapeños and sprinkle with 1/2 teaspoon salt and 1/4 teaspoon pepper. Cook undisturbed until onions begin to brown (30 seconds to 1 minute).
- Place one meatball on each onion mound, press down with the parchment paper, and flatten into a 4-inch-wide patty. Remove parchment and repeat.
- Sprinkle the smashed patties with remaining salt and pepper. Cook until they start to crisp (2 to 3 minutes).
- Flip patties to have the onion-jalapeño mixture on top and add a slice of cheese to 4 of them. Cook until well browned and cheese melts (1 minute and 30 seconds to 2 minutes).
- Stack each cheese-covered patty on a plain patty to create 4 double stacks. Transfer to the bottom bun and spread about 1 tablespoon of burger sauce on each top bun. Place them on top and serve right away.






