Heat a large skillet over medium heat. Add the ground beef, breaking it up with a spatula as it cooks. Sauté for approximately 5-7 minutes, or until the beef is browned and no longer pink. If there is excess fat, drain it off.
Stir in the taco seasoning, along with a pinch of salt and pepper to taste. Incorporate the rinsed black beans and cooked white rice into the skillet, stirring until well combined. Allow the mixture to cook for an additional 2-3 minutes, ensuring everything is heated through.
Remove the skillet from the heat and mix in the taco sauce and half of the shredded cheddar cheese until fully incorporated and melted.
Take one flour tortilla and lay it flat on a clean surface. Spoon a generous portion of the beef mixture into the center. Top with a dollop of sour cream, diced tomatoes, and a sprinkle of the remaining cheddar cheese.
Fold the sides of the tortilla inward over the filling, then roll it up tightly from the bottom to form a burrito. Repeat the process with the remaining tortillas and filling.
For a deliciously melted cheese topping, place the assembled burritos on a baking sheet. Sprinkle any leftover cheddar cheese on top. Bake in a preheated oven at 375°F (190°C) for about 10 minutes, or until the cheese is melted and bubbly.
Carefully remove the burritos from the oven and let them cool slightly. Before serving, garnish with chopped cilantro for an added burst of flavor.
Notes
Serve with extra sour cream and diced tomatoes on the side for dipping. Add a lime wedge for an extra zesty touch!