What Are Jalapeño-Onion Smash Burgers?
If you’re a fan of crispy-edged, juicy smash burgers but crave a little more flavor and heat, then these Jalapeño-Onion Smash Burgers are about to become your new favorite. Combining the rich umami of a perfectly seared patty with the kick of fresh jalapeños and the sweetness of caramelized onions, this burger is a flavor-packed powerhouse.
Smash burgers have taken the food world by storm for their crispy crust and tender centers — and now we’re taking them one step further with a spicy-savory upgrade. Whether you’re grilling for friends, hosting a game day party, or just craving something bold and delicious, these burgers deliver gourmet taste in under 30 minutes.
In this article, we’ll walk you through how to make these irresistible Jalapeño-Onion Smash Burgers , including expert tips, variations, and storage advice so you can enjoy them anytime.
Why You’ll Love These Jalapeño-Onion Smash Burgers
Here’s why this recipe should be your new go-to:
- Bold Flavor Combo : The trio of beef, jalapeños, and caramelized onions hits all the right notes.
- Crispy & Juicy Texture : The smash technique gives you that perfect crispy edge with a juicy center.
- Quick & Easy : Ready in under 30 minutes using simple ingredients.
- Customizable Heat Level : Adjust the amount of jalapeño to suit your spice tolerance.
- Perfect for Any Occasion : Ideal for backyard BBQs, weeknight dinners, or meal prep.
Ingredients Needed (Makes 4 Burgers)
To make these spicy-savory Jalapeño-Onion Smash Burgers , gather the following ingredients:
For the Patties:
- 1 lb ground beef (80/20 blend recommended)
- 1 teaspoon garlic powder
- ½ teaspoon onion powder
- Salt and pepper to taste
- 2 tablespoons finely chopped fresh jalapeños (seeds removed for less heat)
For Topping:
- 4 hamburger buns (brioche or sesame seed recommended)
- 4 slices cheddar cheese (or pepper jack for extra spice)
- ½ cup caramelized onions
- Optional: lettuce, tomato, pickles, avocado
For Cooking:
- Vegetable oil or clarified butter (for smashing and crisping)
Step-by-Step Instructions
Let’s dive into how to make these Jalapeño-Onion Smash Burgers step by step.
Step 1: Prepare the Beef Mixture
In a bowl, combine:
- Ground beef
- Garlic powder
- Onion powder
- Salt and pepper
- Chopped jalapeños
Mix gently with your hands until just combined (avoid overmixing to keep the patties tender).
Divide the mixture into 4 equal portions and roll each into a ball.
Step 2: Cook the Caramelized Onions (Optional Prep Ahead)
Heat a small skillet over medium-low heat. Add a splash of oil and cook sliced onions slowly for 20–25 minutes, stirring occasionally, until golden brown and sweet. Set aside.
Tip: You can also use store-bought caramelized onions if short on time.
Step 3: Preheat Your Pan or Griddle
Use a cast iron skillet or flat griddle. Heat over medium-high heat until hot. Add a thin layer of oil or clarified butter to help with crisping.
Step 4: Smash and Sear the Patties
Place each beef ball onto the hot surface. Using a sturdy metal spatula, press down firmly to flatten the meat into a thin patty (about ¼ inch thick).
Cook for 2–3 minutes per side , until deeply browned and crispy around the edges.
Step 5: Add Cheese and Let Melt
During the last 30 seconds of cooking, place a slice of cheddar or pepper jack cheese on top of each patty and allow it to melt slightly.
Step 6: Toast the Buns
While the burgers cook, lightly toast the buns in a toaster oven, under the broiler, or directly on the grill for 1–2 minutes until golden.
Step 7: Assemble the Burgers
Build each burger by placing the melted cheese side down on the bottom bun. Top with:
- A spoonful of caramelized onions
- Optional: lettuce, tomato, pickles, or avocado
Finish with the top bun and serve immediately.
Pro Tips for the Best Results
Want to take your Jalapeño-Onion Smash Burgers from good to amazing? Try these expert tips:
- Use Room Temperature Beef : Helps the patties hold together better when smashing.
- Don’t Overseason : Jalapeños add natural flavor, so keep other seasonings balanced.
- Press Harder for Crispiest Edges : The harder you press, the crispier the crust.
- Add Bacon for Smokiness : Lay a strip across the patty as it cooks for extra depth.
- Double Stack for Extra Juiciness : Make double-decker smash burgers with two smaller patties per bun.
Variations and Customizations
This recipe is highly customizable! Here are some fun twists to try:
Spicy Mayo Burger
Spread chipotle mayo or sriracha aioli on the buns before assembling.
Vegan Option
Use plant-based ground meat and vegan cheese. Replace jalapeños with diced poblano peppers.
Pineapple Jalapeño Smash
Top with grilled pineapple slices for a sweet-and-spicy contrast.
Blue Cheese Jalapeño Burger
Swap cheddar for crumbled blue cheese for a bold, tangy finish.
Guacamole Smash Burger
Top with guacamole, cilantro-lime crema, and pickled jalapeños for a Mexican-inspired version.
Serving Suggestions
These Jalapeño-Onion Smash Burgers are perfect for:
- Backyard BBQs
- Game Day Snacks
- Weeknight Dinners
- Meal Prep Lunches
- Burger Nights with Friends
Pair them with:
- Crispy French fries or sweet potato fries
- Coleslaw or macaroni salad
- Pickle spears or dill chips
- Iced tea, lemonade, or a cold IPA
Storage and Reheating Tips
Proper storage helps maintain flavor and texture.
Refrigerator Storage:
- Store leftover patties in an airtight container for up to 3 days .
- Freeze uncooked patties for up to 3 months — wrap tightly in plastic wrap and foil.
Reheating:
- Reheat cooked patties in a skillet over low heat or in the microwave for 1–2 minutes.
- Toast buns separately to avoid sogginess.
Nutritional Information (Per Burger)
Here’s an approximate nutritional breakdown per serving (assuming 4 servings):
| Nutrient | Amount |
|---|---|
| Calories | 400–450 kcal |
| Protein | 20–25g |
| Fat | 22–26g |
| Carbohydrates | 25–30g |
| Fiber | 1–2g |
| Sugar | 4–6g |
| Sodium | 600–800mg |
Note: Exact values may vary based on specific brands and portion sizes.
Frequently Asked Questions (FAQs)
Can I Use Different Types of Cheese?
Yes! Try pepper jack, Swiss, mozzarella, or even goat cheese for a unique twist.
Can I Make These Ahead?
Yes! Form the patties ahead of time and refrigerate for up to 24 hours before cooking.
How Do I Keep the Burgers Juicy?
Avoid pressing too hard after cooking and let them rest for a minute before eating.
What If I Don’t Like Spice?
Omit the jalapeños or substitute with mild poblanos or bell peppers.
Can I Bake the Patties Instead of Smashing?
Yes! Bake at 375°F (190°C) on a wire rack-lined baking sheet for 15–18 minutes, flipping halfway through.
Final Thoughts
The Jalapeño-Onion Smash Burger is a bold, flavorful twist on the classic smash burger that brings together heat, sweetness, and savory richness in every bite. With its crispy exterior, juicy center, and vibrant toppings, it’s a burger that stands out from the crowd.
Whether you’re firing up the grill for summer entertaining, feeding a hungry family, or simply treating yourself to something special, these burgers hit all the right notes.
So grab your spatula, fire up the skillet, and get ready to enjoy one of the tastiest burgers you’ve ever made at home.
Print
Jalapeño-Onion Smash Burgers – Spicy, Savory & Totally Addictive
Ingredients
**Burger Sauce:**
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 
**Smash Burgers:**
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 
Instructions
Prepare the burger sauce by mixing all the sauce ingredients in a small bowl. Cover and refrigerate until needed.
For the smash burgers, divide the beef into 8 portions (3 ounces each) and shape them into loose balls on a plate. Cover and chill while you prepare the grill. Cut a 3-inch square of parchment paper and set it aside. Preheat the grill to high (450°F to 500°F) and place a large cast-iron skillet or griddle on the grill to heat up. Alternatively, you can heat the skillet on the stove over high heat.
Drizzle the skillet with oil. If needed, work in batches to arrange onion slices into 8 small mounds (about 1/4 cup each) in the skillet, keeping them at least 2 inches apart. Top each onion mound with jalapeño slices (about 1 tablespoon each) and sprinkle with 1/2 teaspoon salt and 1/4 teaspoon pepper. Cook without stirring until the onions start to brown, about 30 seconds to 1 minute.
Place one meatball on each onion mound. Cover with the parchment paper square and press down firmly with a sturdy spatula or burger press to flatten into 4-inch-wide patties; remove the parchment paper. Repeat with the remaining meatballs and onion mounds. Season the smashed patties with the remaining 3/4 teaspoon salt and 1/2 teaspoon pepper. Cook undisturbed until the edges of the patties begin to crisp, about 2 to 3 minutes.
Flip the patties so the onion-jalapeño mixture is on top. Add one cheese slice to each of 4 patties. Continue cooking until the patties are well browned and the cheese is melted, about 1 minute and 30 seconds to 2 minutes. Stack each cheese-covered patty on top of a plain patty to create 4 double stacks. Transfer each stack to the bottom half of a toasted bun. Spread about 1 tablespoon of burger sauce on each top bun and place it on the patties. Serve immediately.