Get ready to elevate your barbecue game with this mouthwatering barbecued roast beef on a bun recipe. Perfect for a summer cookout or a cozy family dinner, this dish combines the smoky flavors of grilled roast beef with the tangy sweetness of barbecue sauce. Served on toasted buns, it's a simple yet satisfying meal that will leave everyone asking for seconds.
The ingredients for this recipe are quite straightforward. However, if you don't usually have roast beef on hand, you might need to make a special trip to the supermarket. Look for a well-trimmed cut to ensure even cooking. Additionally, make sure you have a good quality barbecue sauce to enhance the flavor of the meat.

Ingredients for Barbecued Roast Beef on a Bun
Roast beef: A well-trimmed cut of beef, perfect for grilling and absorbing the flavors of the barbecue sauce.
Barbecue sauce: A tangy and sweet sauce that will be brushed onto the roast beef to add flavor and moisture.
Buns: Split and toasted, these will serve as the base for your delicious barbecued roast beef.
Technique Tip for Perfecting This Recipe
To ensure your roast beef remains juicy and flavorful, use a meat thermometer to monitor the internal temperature closely. Insert the thermometer into the thickest part of the meat without touching any bones. This will give you an accurate reading and help you avoid overcooking. Additionally, letting the roast beef rest for 10 minutes after grilling allows the juices to redistribute throughout the meat, making each slice more tender and succulent.
Suggested Side Dishes
Alternative Ingredients
trimmed roast beef - Substitute with pulled pork: Pulled pork has a similar texture and can absorb barbecue sauce well, making it a great alternative for a barbecue sandwich.
trimmed roast beef - Substitute with grilled chicken breast: Grilled chicken breast is a leaner option and can be easily flavored with barbecue sauce for a lighter version of the sandwich.
barbecue sauce - Substitute with teriyaki sauce: Teriyaki sauce provides a sweet and savory flavor profile that can complement the meat similarly to barbecue sauce.
barbecue sauce - Substitute with honey mustard sauce: Honey mustard offers a tangy and sweet flavor that pairs well with meats and can provide a unique twist on the traditional barbecue flavor.
split and toasted buns - Substitute with ciabatta rolls: Ciabatta rolls have a sturdy texture that holds up well to the juicy meat and sauce, providing a satisfying bite.
split and toasted buns - Substitute with whole wheat buns: Whole wheat buns offer a healthier alternative with added fiber and nutrients, while still providing a good base for the sandwich.
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How to Store or Freeze This Dish
- Allow the roast beef to cool completely before storing. This helps prevent condensation, which can make the meat soggy.
- Slice the roast beef thinly for easier storage and quicker reheating.
- Place the sliced roast beef in an airtight container or wrap it tightly in aluminum foil. For added protection, you can also use a resealable plastic bag.
- Store the roast beef in the refrigerator for up to 3-4 days. Make sure to label the container with the date to keep track of freshness.
- If you plan to freeze the roast beef, wrap it in a layer of plastic wrap followed by a layer of aluminum foil. This double wrapping helps prevent freezer burn.
- For longer storage, place the wrapped roast beef in a resealable freezer bag. Squeeze out as much air as possible before sealing.
- Label the freezer bag with the date and contents. The roast beef can be frozen for up to 2-3 months.
- To reheat, thaw the roast beef in the refrigerator overnight if frozen. Reheat in a preheated oven at 350°F (175°C) until warmed through, or use a microwave for quicker results.
- For the buns, store them in a bread box or a resealable plastic bag at room temperature for up to 2-3 days. For longer storage, freeze the buns in a resealable plastic bag for up to 1 month.
- To reheat frozen buns, let them thaw at room temperature or warm them in the oven at 350°F (175°C) for a few minutes until soft and warm.
How to Reheat Leftovers
Oven Reheat Method:
- Preheat your oven to 325°F (165°C).
- Wrap the roast beef slices in aluminum foil, adding a splash of beef broth or water to keep it moist.
- Place the wrapped beef on a baking sheet and heat for about 15-20 minutes, or until warmed through.
- For the buns, wrap them in foil and place them in the oven for the last 5 minutes of the beef reheating time.
Stovetop Reheat Method:
- Heat a skillet over medium heat and add a small amount of olive oil or butter.
- Add the roast beef slices to the skillet and cover with a lid.
- Heat for about 5-7 minutes, turning occasionally, until the beef is warmed through.
- Toast the buns in a separate skillet or in a toaster.
Microwave Reheat Method:
- Place the roast beef slices on a microwave-safe plate and cover with a damp paper towel.
- Microwave on medium power for 1-2 minutes, checking and stirring halfway through.
- For the buns, wrap them in a damp paper towel and microwave for 15-20 seconds.
Sous Vide Reheat Method:
- Place the roast beef slices in a vacuum-sealed bag or a ziplock bag with the air removed.
- Heat a pot of water to 140°F (60°C) using a sous vide machine.
- Submerge the bag in the water and heat for about 45 minutes.
- Toast the buns separately in a toaster or oven.
Air Fryer Reheat Method:
- Preheat your air fryer to 350°F (175°C).
- Place the roast beef slices in the air fryer basket, making sure they are not overlapping.
- Heat for 3-5 minutes, checking halfway through to ensure they don’t dry out.
- For the buns, place them in the air fryer for the last 1-2 minutes of the beef reheating time.
Essential Tools for Making This Recipe
Grill: Used to cook the roast beef to achieve a smoky, charred flavor.
Meat thermometer: Essential for checking the internal temperature of the roast beef to ensure it reaches 145°F (63°C).
Tongs: Handy for turning and handling the roast beef on the grill.
Basting brush: Used to apply the barbecue sauce to the roast beef during the last 15 minutes of grilling.
Cutting board: Provides a stable surface for slicing the roast beef after it has rested.
Chef's knife: Necessary for slicing the roast beef into thin, even pieces.
Buns: Split and toasted, these are used to serve the sliced roast beef.
Aluminum foil: Useful for tenting the roast beef while it rests to keep it warm and juicy.
Serving platter: Ideal for arranging the sliced roast beef before placing it on the buns.
How to Save Time on Making This Dish
Use a meat thermometer: This ensures the roast beef reaches the perfect internal temperature without overcooking.
Pre-slice buns: Have your buns split and ready to go before you start grilling.
Marinate overnight: Season and marinate the roast beef the night before to enhance flavor and save time.
Use store-bought barbecue sauce: Opt for a high-quality barbecue sauce to save time on making your own.
Rest before slicing: Let the roast beef rest for 10 minutes to retain juices, making slicing easier and quicker.

Barbecued Roast Beef on a Bun
Ingredients
Main Ingredients
- 2 lbs Roast beef trimmed
- 1 cup Barbecue sauce
- 4 Buns split and toasted
Instructions
- Preheat your grill to medium-high heat.
- Season the roast beef with salt and pepper.
- Grill the roast beef for about 1 hour per pound, or until the internal temperature reaches 145°F (63°C).
- Brush the roast beef with barbecue sauce during the last 15 minutes of grilling.
- Remove the roast beef from the grill and let it rest for 10 minutes before slicing.
- Serve the sliced roast beef on toasted buns with extra barbecue sauce if desired.
Nutritional Value
Keywords
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