Start by slicing the cabbage into thin shreds. This ensures that it cooks evenly and absorbs all the delicious flavors from the other ingredients.
In a large skillet, melt the butter over medium heat. Add the ground beef and cook until browned, breaking it apart with a spatula as it cooks. This should take about 5-7 minutes.
Once the beef is browned, sprinkle the taco seasoning mix and dried minced onion over the meat. Stir well to coat the beef evenly with the spices.
Add the shredded cabbage to the skillet. Stir everything together, allowing the cabbage to wilt and soften, which will take about 5 minutes. Season with salt and pepper to taste.
Once the cabbage is tender, sprinkle the Mexican cheese blend over the top. Cover the skillet with a lid and let it sit for 2-3 minutes, or until the cheese has melted.
Remove the skillet from the heat and serve the Tex-Mex Ground Beef and Cabbage Skillet warm. It's perfect on its own or served with tortillas for a complete meal!