If you’re craving a late night burger, this Cheesy Double Smash Burger made Dom ask for seconds immediately. There's something so special about late night juicy burgers, with tender beef, melty cheese, tangy savory sauce, and sweet caramelized onion. Plus, you can add all of your favorite burger toppings, from pickles to sautéed mushrooms. Don’t miss out, because I’m also sharing my creamy homemade burger sauce, which makes this burger 10x better!
Make the sauce: In a small bowl, whisk together the mayo, ketchup, mustard, paprika, garlic powder, and pickle juice. For the black pepper version, skip the garlic powder and add Sizzling Black Pepper Sauce instead. Set aside.
Form the patties: Roll the ground beef into two 4 oz balls. Place them on a hot flattop or cast-iron skillet. Season the tops lightly with salt and pepper.
Add the onions: Pile about half of the sliced onion on top of each beef ball. Place a piece of parchment paper over the onion and use a sturdy spatula to firmly smash the beef down into a thin patty, pressing the onions into the meat.
Cook the first side: Let the patties cook onion-side down for 2–3 minutes, until the edges crisp and the onions begin to caramelize.
Flip and melt the cheese: Flip the patties, season the cooked side with a pinch of salt, and immediately top each with a slice of cheese. Cook for another 1½–2 minutes, until the cheese melts and the patty is fully cooked through.
Toast the buns: While the patties finish, toast the cut sides of the burger buns directly on the grill or skillet until golden.
Assemble burger: Spread about 2 tbsp of burger sauce on the bottom bun. Stack both patties on top, add your favorite toppings, then finish with the top bun.
Serve immediately: Press gently, and enjoy while hot.