The Double Smash Cheeseburger with Grilled Onions is a mouthwatering classic that delivers crispy edges, juicy centers, melty cheese, and sweet, caramelized onions in every satisfying bite. This recipe is perfect for burger lovers who want to recreate that diner-style smash burger experience at home without complicated steps. It yields two hearty burgers, ideal for a cozy dinner or casual weekend treat.
With just under 25 minutes from start to finish—including a quick 10-minute prep and 15-minute cook time—this recipe balances juicy beef patties smashed thin for crisp texture, topped with classic American cheese and savory grilled onions. The combination of textures and flavors works beautifully for anyone looking for an easy yet impressive burger experience that feels indulgent but comes together fast.
Why you’ll love this Double Smash Cheeseburger with Grilled Onions
- Thin smashed patties develop irresistibly crispy edges while maintaining juicy, tender centers, creating an ideal texture contrast.
- Sweet, caramelized grilled onions add a rich, savory-sweet depth that perfectly complements the beef’s robust flavor.
- This recipe is quick and straightforward, making it an excellent choice for weeknight dinners or casual get-togethers without fuss.
- Uses simple, classic ingredients that are easy to find, affordable, and come together to create a timeless burger flavor profile.
- Stacking two cheesy patties enhances the richness, delivering a satisfying and indulgent cheeseburger experience that’s sure to please.
Ingredients
- 1 lb ground beef (80/20)
- 1 large yellow onion, thinly sliced
- 4 slices American cheese
- 2 soft burger buns
- 1 tbsp butter or neutral oil
- 1 tsp kosher salt
- 1/2 tsp black pepper
This recipe makes 2 burgers and takes about 10 minutes to prepare and 15 minutes to cook. The key ingredients include ground beef with an 80/20 fat ratio, which is crucial for juicy, flavorful patties that crisp up beautifully when smashed. Yellow onions are chosen for their natural sweetness, which intensifies when grilled slowly. For buns, select soft, fresh rolls that toast well without becoming soggy—potato or brioche buns work wonderfully. American cheese is preferred for its perfect melt and creamy texture that complements the beef. Butter or neutral oil helps achieve deep caramelization on the onions and a golden toast on the buns, adding extra flavor and texture to the finished burger.
Instructions
- Divide the beef: Separate the ground beef into 4 loose balls, roughly 4 ounces each, and keep them chilled until ready to cook.
- Cook the onions: Heat a flat-top or heavy skillet over medium-high to high heat. Add butter or oil, then cook the sliced onions with a pinch of salt until softened and browned, about 8 to 12 minutes. Move onions aside and keep warm.
- Toast the buns: Lightly toast the burger buns on the griddle until golden and slightly crisp.
- Smash the patties: Place the beef balls on the hot cooking surface and press each one very thin using a sturdy spatula. Season with kosher salt and black pepper.
- Cook the patties: Let the patties cook until their edges are dark and crisp, about 1 to 2 minutes. Flip each patty and immediately top with a slice of American cheese as needed for stacking. Cook an additional 30 to 60 seconds until cheese melts.
- Assemble the burgers: Stack two cheesy patties on the bottom bun, then pile on the warm grilled onions.
- Finish and serve: Close the burger with the top bun and serve immediately while hot and juicy.
Tips for the best results
- Choose 80/20 ground beef: The 20% fat content is essential for juicy, flavorful patties that crisp up well when smashed. Leaner beef will dry out and won’t develop the same crust.
- Keep beef balls loosely packed and cold: This helps you smash them thinly and evenly without compacting the meat, which can make patties tough. Cold beef also prevents sticking to the spatula and cooks better.
- Press patties firmly and evenly: Applying even pressure ensures thin, uniform patties that cook consistently and develop those signature crispy edges. Avoid overworking the meat to keep it tender.
- Caramelize onions slowly over medium-high heat: Stir occasionally to prevent burning, but allow enough contact time for sugars to develop deep, rich flavors. This slow cooking transforms the onions’ sharpness into sweet complexity.
- Toast buns just before assembly: Toasting adds a pleasant crunch and creates a barrier that prevents sogginess from burger juices and onions, improving overall texture.
- Serve burgers immediately: Enjoy the cheese at its meltiest and patties at their juiciest. Delaying serving can cause the cheese to firm up and the patties to lose moisture.
Variations and substitutions
- Cheese alternatives: Swap American cheese for sharp cheddar, Swiss, or pepper jack to introduce different flavor notes and textures.
- Onion variations: Use red onions for a slightly sharper and tangier grilled onion flavor that adds complexity.
- Additional toppings: Add pickles, lettuce, or fresh tomato slices for brightness and crunch that balance the rich burger.
- Bun options: Try brioche or pretzel buns for a richer, slightly sweet or savory bread base that elevates the burger.
- Seasoned beef: Incorporate spices like smoked paprika, garlic powder, or onion powder into the beef for a subtle flavor boost without overpowering.
Serving suggestions
Serve these Double Smash Cheeseburgers alongside classic sides such as crispy French fries, golden onion rings, or a crisp green salad to create a well-rounded meal. The richness of the burgers pairs beautifully with refreshing beverages like cold sodas or a chilled craft beer, which help cut through the savory flavors. For a lighter twist, add pickles, fresh tomato slices, or leafy greens inside the burger to add freshness and contrast to the indulgent patties and cheese. This combination makes for a satisfying meal that feels both comforting and balanced.
Storage and reheating
If you have leftovers, store the burger patties and grilled onions separately in airtight containers in the refrigerator for up to 2 days to maintain freshness and texture. When reheating, warm the patties gently in a skillet over low to medium heat or in the oven to avoid drying them out. Reheat the onions on the stove with a splash of water or butter to restore their softness. Toast the buns lightly again before assembling to bring back their crisp texture and warmth, ensuring the reheated burger remains enjoyable and close to freshly made.
Frequently asked questions
What is the best type of ground beef for smash burgers?
The ideal ground beef for smash burgers has an 80/20 lean-to-fat ratio. This balance ensures the patties stay juicy and flavorful while developing those crispy, caramelized edges that define a smash burger. Higher fat content melts during cooking, creating moisture and taste, while too lean beef can become dry and less flavorful.
Can I use other cheeses besides American?
Absolutely. While American cheese is the classic choice due to its creamy melt and mild flavor, you can substitute cheddar for a sharper taste, Swiss for nuttiness, or pepper jack for a spicy kick. Just ensure the cheese melts quickly since smash burgers cook fast, so softer, melt-friendly cheeses work best.
How do I get the perfect crispy edges on smash burger patties?
To achieve perfect crispy edges, press the beef balls very thinly and evenly onto a hot, flat cooking surface using a sturdy spatula. Avoid moving the patties while they cook to allow the Maillard reaction to create that signature crust. High heat is key to rapidly crisp the edges while keeping the inside juicy.
Can I prepare the grilled onions ahead of time?
Yes, grilled onions can be caramelized in advance and stored in the refrigerator for up to 2 days. Reheat them gently on the stove before assembling your burgers to maintain their soft texture and rich flavor. This prep can save time on busy days while preserving the depth that slow cooking develops.
What buns work best for this burger?
Soft burger buns such as potato rolls, brioche, or classic white buns are excellent choices. They offer a tender crumb that contrasts nicely with the crispy patties. Toasting the buns before serving adds a slight crunch and helps prevent sogginess from the burger juices and toppings, contributing to a better overall bite.
Final thoughts
The Double Smash Cheeseburger with Grilled Onions is a deliciously simple recipe that turns everyday ingredients into a juicy, crispy, and flavorful burger experience. Its combination of thin smashed patties, gooey melted cheese, and sweet grilled onions creates an irresistible meal that’s easy to prepare but impressive in taste. Whether for a quick weeknight dinner or a weekend treat, this recipe invites you to enjoy classic American burger perfection in your own kitchen. Give it a try and savor every delicious bite!