Smoky Mustard BBQ Burgers with Caramelized Onions and Pickles

Mustard BBQ Burgers are an easy, flavorful weeknight dinner that grill up quickly and please the whole family. The tangy rosemary mustard barbecue blends into the beef for a bright, savory taste, while crispy onion strings add a crunchy finish. Serve with lettuce, tomato and your favorite condiments for a classic, satisfying burger.

Mustard BBQ Sauce Burgers with onion strings and fries

Burgers are a reliable, quick dinner option, and grilled burgers are especially delicious. These Mustard BBQ Burgers have great flavor from the rosemary mustard BBQ sauce and are finished with crisp onion strings for texture and contrast. They’re simple to prepare and make a great meal for busy nights or casual weekend cookouts.

Grilled Mustard BBQ Burgers with onion strings

To make rosemary mustard BBQ sauce you will need:

  • prepared yellow mustard
  • brown sugar
  • Worcestershire sauce
  • dried rosemary
  • onion flakes
  • garlic powder
  • black pepper
  • kosher salt

For a printable version of the full rosemary mustard BBQ sauce recipe, use the original source recipe for measurements and method.

How to Make Mustard BBQ Burgers

Ground Beef and Mustard BBQ Sauce

  • In a bowl, mix 2 pounds of lean ground beef with about 2/3 cup of rosemary mustard BBQ sauce (adjust to taste). Combine gently—don’t overwork the meat.
  • Form the mixture into six even patties, pressing a shallow indentation in the center of each to help them cook evenly and reduce doming.
  • Prepare your grill for medium heat, aiming for roughly 300°F. For a smoky note, use oak or hickory wood or chips.

Mustard BBQ Burger Patties

  • Place the patties over direct heat and sear for about 2 minutes per side to develop a crust. After searing, move the burgers to indirect heat, close the lid and continue cooking.
  • Cook until the internal temperature reaches 165°F for well-done burgers (about 8–10 minutes per side will vary with thickness and grill temperature). Use a digital thermometer for accuracy.
  • Remove the patties from the grill and let them rest briefly before assembling.

Grilled Burgers with mustard bbq sauce

  • Prepare crispy onion strings separately and keep them ready to top the burgers for a crunchy finish.
  • Toast buns on the grill if desired. Layer buns with lettuce and tomato, add a burger patty, then crown with onion strings and any additional condiments you like.

How to Grill Mustard Burgers

Ingredients (Serves 6)

  • 2 pounds lean ground beef
  • 2/3 cup Rosemary Mustard BBQ Sauce
  • 6 burger buns
  • Onion strings (prepared)
  • Lettuce leaves
  • Tomato slices

Instructions

  1. Mix the ground beef with the rosemary mustard BBQ sauce in a bowl, forming six evenly sized patties. Press a slight indentation into the center of each patty.
  2. Build a medium grill fire, around 300°F, and add hickory or oak for a smoky flavor if available.
  3. Place the burgers over direct heat to sear, then move to indirect heat to finish. Cook until the internal temperature reaches 165°F, about 8–10 minutes per side depending on thickness and grill heat.
  4. Remove the burgers from the grill and let them rest for a couple of minutes.
  5. Assemble: top the bottom bun with lettuce and tomato, add the burger, then finish with crispy onion strings and favorite condiments. Serve immediately.

Easy Onion Strings

Nutrition (approx. per burger)

Calories: 513 kcal | Carbohydrates: 29 g | Protein: 49 g | Fat: 21 g | Saturated Fat: 8 g | Sodium: 726 mg

Mustard BBQ Sauce with crispy onions

Serving Suggestions

These burgers pair well with classic sides like French fries, a simple salad, or coleslaw. The rosemary mustard BBQ sauce adds bright savory notes that complement smoky grilled flavors and the crisp texture of onion strings. Make the sauce ahead of time for an even quicker dinner.

Other Burgers to Try

If you enjoy grilling burgers, consider variations such as mushroom and Swiss, bacon double cheeseburgers, grilled onion burgers, or a hearty brunch burger with hash browns and a fried egg. Each offers a different flavor profile while keeping the ease of a grilled burger night.

Platter of 2 Grilled Burgers with onion strings and fries

These Mustard BBQ Burgers make a reliably delicious meal anytime. The rosemary mustard BBQ sauce is worth the effort for its bright, tangy depth—mix it into the meat, grill the patties, and finish with crisp onion strings for a satisfying bite every time.