Step 1: Cook the Beef and Onion
In a large pot, heat 1 tablespoon olive oil over medium heat. Add ground beef and diced onion. Cook until beef is fully browned and the onion is softened, about 6–8 minutes. Drain any excess fat.

Step 2: Add Liquids and Seasoning
Stir in 2 cups beef broth and 1 cup milk. Sprinkle in the ranch seasoning mix and stir to combine, scraping up any browned bits from the bottom of the pan.

Step 3: Add the Pasta
Stir in 8 oz of your chosen pasta. Make sure the pasta is fully submerged in the liquid.

Step 4: Simmer to Cook Pasta
Bring the mixture to a gentle boil, then reduce heat to low. Cover the pot and let it simmer for 10–12 minutes, stirring occasionally, until the pasta is tender and most of the liquid has been absorbed.

Step 5: Melt in the Cheese
Once the pasta is cooked, remove the pot from the heat. Stir in 2 cups shredded cheddar cheese until fully melted and the sauce is creamy.

Step 6: Final Seasoning
Taste and season with salt and pepper as needed. Serve hot and enjoy!