In a large skillet, heat over medium-high heat. Add the lean ground beef, breaking it apart with a spatula as it cooks. You want to ensure it’s browned thoroughly and there’s no pink remaining. The beef should be nicely caramelized.
Once the beef is browned, carefully drain any excess fat from the skillet. This step is crucial to avoid a greasy sauce later. Return the skillet to the heat and add the dried minced onion flakes and garlic powder. Stir them in, letting their flavors infuse the beef for a minute.
Next, add the tomato paste to the skillet. Use a spatula to mix it in thoroughly with the beef, creating a rich base.
Pour in the ketchup and stir well. As you mix it in, you’ll notice the sauce becoming thicker and more vibrant.
Add the water to the mixture, adjusting the consistency, and bring it to a gentle boil, stirring occasionally.
Once boiling, lower the heat and add the white vinegar, dry mustard, and brown sugar. Stir everything together until well combined.
Let the mixture simmer on low heat for about 20 to 25 minutes. Keep an eye on it, stirring occasionally, so it doesn’t stick.
Taste the mixture and adjust the seasoning with salt and pepper to your liking.
Once the sauce has thickened to your desired consistency and the flavors are spot on, remove the skillet from the heat. Gather your buns and prepare to serve.
Finally, spoon generous amounts of the sloppy joe mixture onto each bun. Serve them warm and enjoy!