The one rule that makes ground beef different
A ribeye and a pound of ground chuck might come from the same steer, but they don’t follow the same food-safety rules, and understanding why is the key to cooking ground beef confidently. On a whole cut of beef, harmful bacteria live only on the outside surface. The interior of an intact muscle is essentially sterile, which is why a steak can be seared on the outside and served rare in the middle: the heat sterilizes the surface where the bacteria are, and the never-exposed interior was safe all along.
Grinding destroys that geography. It takes whatever was on the surface, plus whatever the grinder and blades pick up, and distributes it evenly throughout the meat. Now there is no clean interior. Every part of the ground beef could carry bacteria, so every part has to reach a temperature that kills them. That temperature is 160°F (71°C), and it applies to every burger and every crumble of taco meat, no exceptions for “medium-rare.” This is the single most important fact about cooking ground beef, and it’s the reason a pink steak is fine but a pink supermarket burger is a gamble.
Color, by the way, is not a substitute for a thermometer. Ground beef can turn brown before it reaches 160°F (premature browning, common in meat that’s been frozen or has a particular pH) and can stay pink well past it. The “cook until no longer pink” advice fails in both directions. An instant-read thermometer pushed into the center of the thickest patty is the only way to know.
Fat is flavor, and the ratio is a choice
Once the temperature rule is settled, the fun part is choosing your fat ratio, because cooking to 160°F means you need fat to keep things juicy. The numbers on the label, 80/20, 85/15, 90/10, are the percentages of lean to fat.
For burgers, 80/20 (often sold as ground chuck) is the classic, and for good reason. As the patty cooks to a safe 160°F, the fat melts and bastes the meat from within, keeping it juicy where a leaner grind would dry out. Go to 85/15 if you want a little less grease, but think hard before buying 90/10 or leaner for burgers, those make dry, crumbly patties, because there simply isn’t enough fat to survive the cook. Save the lean grinds for dishes like a quick Bolognese or chili where the meat is one element among many and any rendered fat would just be drained off anyway.
If you care about the very best burger, grind your own from a chunk of chuck, or ask the butcher to grind a piece fresh. Single-source meat ground once is both safer (fewer animals and surfaces in the mix) and cleaner-tasting than the mass-blended grind in most tubes and trays.
Handle it like it’s fragile
The other half of great ground beef is restraint. Ground meat is at its best when it’s barely handled, and most home cooks work it far too hard. For burgers, form the patties with a loose hand and stop the instant they hold together; every extra squeeze compacts the meat and dissolves proteins that turn a tender burger into a bouncy, dense one. Keep the meat cold right up until it cooks, so the fat stays firm and doesn’t smear. And salt burgers only on the outside, just before they hit the heat, salt mixed into the meat early extracts the same sticky proteins that make sausage springy (which is exactly what you do want for meatballs and meatloaf, and exactly what you don’t want in a burger).
On the heat, give the meat room. Crumbles brown and crisp in an uncrowded, properly hot pan; pile too much in at once and the meat steams in its own juice and turns gray. And never press down on a cooking burger, that satisfying sizzle and flare is the juice and fat you wanted to eat leaving the patty. Flip once, cook to 160°F, and let it rest a minute. The per-method guides below cover pan-frying, baking, and slow-cooking in detail.