BBQ Bacon Smash Burgers With Bacon-Onion Sauce and American Cheese

A comfort-food burger with a “next level” BBQ twist

A cheeseburger can be perfect in its simplest form, but there are nights when “just a cheeseburger” doesn’t feel like enough. One familiar upgrade is bacon, but this BBQ bacon smash burger takes a more distinctive route: instead of laying bacon strips on top, the bacon is cooked, chopped, and folded directly into a smoky-sweet bacon-onion barbecue sauce. The result is a burger that still feels classic—thin, crispy patties and melted American cheese—while the sauce brings a tangy, savory depth that stands out from the usual bottle-and-squirt approach.

The sauce is designed to do more than add sweetness. Bacon contributes smoky savoriness, while onions sautéed in bacon drippings develop a caramelized sweetness. That balance makes it easy to be generous with the topping, and if you like to serve a side of tater tots or fries, the sauce also pulls double duty as a dip.

What makes this burger different: bacon goes into the sauce

Many bacon burgers treat bacon as a garnish—crisp strips perched on top of the patty. Here, bacon is an ingredient in the barbecue sauce itself. That choice changes the overall bite: instead of isolated bacon crunch, the smoky flavor is integrated throughout the saucy layer, so every mouthful gets that savory-sweet profile.

Because the sauce includes bacon, it’s worth thinking about storage. If you end up with extra, keep it refrigerated in a sealed container and plan to use it within about a week. The added protein means it won’t keep quite as long as a typical homemade barbecue sauce.

Ingredients overview

This recipe has two main components: the bacon-onion barbecue sauce and the smash burgers. The ingredient list is straightforward and built around pantry staples, with a few key seasonings to round out the sauce.

• For the bacon-onion BBQ sauce: diced bacon, yellow onion, ketchup, Dijon mustard, brown sugar, apple cider vinegar, soy sauce, Worcestershire sauce, onion powder, garlic powder, smoked paprika
• For the burgers: ground beef, mayonnaise, salt, pepper, burger buns, salted butter, American cheese
• For finishing: scallion, pickles

Step-by-step: bacon-onion barbecue sauce

The sauce starts with bacon and uses the rendered drippings as the cooking fat for the onions. That’s where much of the smoky foundation is built, before the rest of the sauce ingredients go in to simmer and thicken.

• Cook the diced bacon over medium heat until brown and crisp.
• Remove the bacon with a slotted spoon and set it aside, leaving the drippings in the pan.
• Add the yellow onion to the drippings, stir, and sauté until soft and lightly browned, about 5 minutes.
• Add ketchup, Dijon mustard, brown sugar, apple cider vinegar, soy sauce, Worcestershire sauce, onion powder, garlic powder, and smoked paprika. Whisk to combine and bring to a simmer.
• Once simmering, reduce heat to low, return the bacon to the pan, and cook for 10 minutes, stirring frequently.

At this point, you’ll have a tangy, smoky sauce with bits of bacon and softened onion throughout. Set it aside while you move on to the patties, and keep in mind you may have extra—use it later as a dip or a repeat topping.

Step-by-step: smash burger patties and assembly

The burger portion is built around a classic smash-burger approach: small balls of seasoned beef are seared hard, then pressed thin to maximize contact with the hot surface. The recipe finishes each patty with American cheese, then stacks two patties per bun for a double-smash build.

• In a large bowl, combine ground beef, mayonnaise, salt, and pepper.
• Mix thoroughly using your hands.
• Divide the mixture into 8 even balls.
• Spread burger buns with softened salted butter and toast until lightly golden. Set aside.
• Spritz a large skillet or griddle pan with cooking spray and preheat over medium-high heat.
• Working in batches if needed, add burger balls to the hot skillet and sear for 1 minute.
• Firmly press the burgers flat using a burger press or a slightly smaller heavy-bottom skillet.
• Cook for 2 minutes, or until deeply seared.
• Flip, press again, and sear for another 2 minutes on the second side until deeply seared.
• Remove the press and top each patty with 1 slice of American cheese.
• Once the cheese melts, stack 2 patties on a toasted bottom bun.
• Generously top with the bacon-onion BBQ sauce.
• Finish with scallions and pickle slices, then cap with the toasted top bun.

Why smashing matters: pressure creates the crust

Smash burgers are defined by their thinness and their seared, caramelized exterior. That thin shape doesn’t happen by accident: it comes from pressing the meat down onto a hot cooking surface. The goal is “max sear,” and that requires constant weight. In other words, pressure isn’t just a shaping tool—it’s the method that produces the crisp, browned crust that makes smash burgers so appealing.

There’s also a practical reason the pressing happens more than once. Thin patties, once pressed and released, can pucker or bubble, which reduces contact with the pan. Less contact means less sear, and sear is the point. Reapplying the press after flipping helps keep the patty flat against the surface so it can brown deeply on both sides.

The mayonnaise factor: crust, juiciness, and flavor

Mayonnaise may not be the first ingredient people think to add to a burger mix, but it serves a few specific purposes in this recipe. First, it supports caramelization, helping the patties develop a more uniform, crispy brown crust and a faster-forming crust. Second, it helps with moisture retention—especially important for thin patties, which can release moisture quickly as they cook. Because mayo is oil- and fat-based, it helps maintain and enhance juiciness even when the meat is pressed very thin.

Finally, mayo contributes flavor: a savory depth and a tangy richness that can round out the beef. If you prefer to skip it, the guidance is to choose a higher-fat ground beef—something like an 80/20 or 85/15 ratio—and avoid lean beef, which is less forgiving in a thin, high-heat smash-burger cook.

Serving notes: build it like a double, sauce it like you mean it

The assembly here is intentionally bold: two thin patties per bun, each capped with melted American cheese. That double stack gives you more crisp edges and more surface area for sauce. The bacon-onion barbecue sauce is meant to be applied generously, and the finishing touches—scallions and pickles—add freshness and tang that cut through the richness of beef, cheese, and bacon.

If you’re planning sides, it’s worth holding back a portion of sauce before you start building burgers. It works well as a dip for fries or tater tots, and since the recipe often yields extra, you can enjoy it across multiple meals as long as it’s refrigerated in a sealed container and used within about a week.

What to expect in the final bite

This burger is designed to feel both elevated and familiar. The familiarity comes from the essentials: toasted buns, American cheese, pickles, and the unmistakable comfort of a cheeseburger. The “elevated” part is the combination of technique and sauce: thin patties pressed for deep sear, and a smoky-sweet barbecue sauce enriched with bacon and onions cooked in bacon drippings.

Put together, it’s a burger that leans into contrast—crisp edges against melted cheese, tangy sauce against savory beef, and bright scallions and pickles against the smoky sweetness of bacon and onion. If you’ve been craving a burger that goes beyond the basics without drifting too far from what makes a cheeseburger satisfying, this approach hits that middle ground.