GROUND HAMBURGER Ground from the trimmings of any cut of beef. Fat can be added, but the total fat content allowable is capped at a whopping 30% by weight (81% calories from fat, raw).
GROUND BEEF Like hamburger but no added fat.
GROUND CHUCK Beef ground from the chuck (shoulder section) that contains about 15% to 20% fat (63% to 71% calories from fat, raw).
GROUND ROUND From the round (rump to hind leg), about 10% to 15% fat (51% to 63% calories from fat, raw).
GROUND SIRLOIN We like beef ground from the lean sirloin, which contains about 8% to 10% fat (up to 51% calories from fat, raw). In a recent blind tasting of several types of ground sirloin (grain-fed, organic, grass-fed, and Angus), the beefy-tasting grass-fed was the unanimous winner.