https://www.youtube.com/watch?v=nW3wF1MtWJ4&t=15s
TLDR For deeply browned, flavorful ground beef, use a hot, wide pan, cook in uncrowded batches, and let large chunks sear undisturbed before breaking them up; excess moisture causes steaming instead of browning. Save some rendered fat and deglaze the browned bits for extra flavor, and cook the beef to 160°F for safety.
Preheat a wide, heavy pan so the beef begins browning as soon as it touches the surface. Pat the meat dry and thaw it completely, since excess moisture can cool the pan and make the beef steam. If you’re using lean beef, add a little oil; beef with about 20% fat typically provides more flavor and helps with browning.
Cook the beef in batches rather than packing the pan, which allows moisture to evaporate instead of collecting around the meat. Place the beef in large chunks and let one side brown before breaking it into smaller pieces. Leave it undisturbed for three or four minutes and resist pressing it, so a savory crust can form.
Avoid salting raw ground beef long before cooking, as cooks differ on whether the best time to season is at the start or after browning. Once the beef is browned, consider keeping a spoonful or two of rendered fat to cook vegetables. Scrape up the browned bits by deglazing the pan with wine, stock, or water to add flavor to a sauce.
Use a food thermometer to confirm that ground beef reaches 160°F. Color alone is not a reliable safety test: gray beef may be less flavorful because it steamed, but its appearance does not by itself establish whether it is safe to eat. Temperature provides a more dependable check.
For ragù alla Bolognese, render pork and brown the beef before gently cooking onion, carrot, and celery in the flavorful fat. Add wine, milk, a little tomato, and broth, then let the sauce simmer for hours. In Bologna, ragù is traditionally served with tagliatelle or layered into lasagna rather than spooned over spaghetti.
Use a wide, heavy pan that is thoroughly preheated, and cook the beef in uncrowded batches. Pat it dry and thaw it first, then place it in large chunks. Leave it undisturbed for three or four minutes so a crust can form before breaking it up; avoid pressing it down.
Water released or trapped in the pan keeps the meat near 212°F, too cool for the Maillard reaction that creates a browned crust and savory flavor. Giving the beef room and time helps the moisture evaporate.
Beef with about 20% fat tends to brown and taste better. If using leaner beef, add a little oil to the pan.
Avoid salting raw beef long before cooking. Cooks disagree about whether to salt at the start or after browning, so either approach may be used.
Save a spoonful or two of rendered fat to cook vegetables, then deglaze the browned bits on the pan with wine, stock, or water and add the liquid to the sauce.
Cook ground beef to 160°F and use a thermometer rather than judging safety by color. Gray beef is not necessarily unsafe; it is simply less flavorful if it has not browned well.
Render pork, brown the beef, and gently cook onion, carrot, and celery in the meat fat. Add wine, milk, a little tomato, and broth, then simmer for hours. Traditionally, ragù is served with tagliatelle or layered into lasagna, not served over spaghetti.