01 -
Heat a large skillet over medium-high heat. Add ground beef in an even layer. Season immediately with granulated garlic, kosher salt, and black pepper. Cook, breaking up the meat with a spatula, until it begins to develop caramelized brown edges, about 5 minutes.
02 -
Add finely diced onions to the beef. Continue cooking, stirring occasionally, until onions are softened and translucent, and the beef develops crispy, caramelized spots, about 3 to 4 minutes.
03 -
Reduce heat to medium. Pour Dr. Pepper barbecue sauce over the beef-onion mixture. Stir thoroughly to evenly coat all contents. Allow the sauce to bubble and begin to thicken, about 2 minutes.
04 -
Lower the heat and let the mixture simmer for 5 minutes to meld flavors and create a thick, cohesive consistency.
05 -
Keep the mixture warm over low heat until ready to serve, or transfer to a slow cooker set to warm if holding for more than 15 minutes.
06 -
Spoon generously onto sandwich buns. Serve immediately while hot for optimal texture and flavor.