Ground beef in an American supermarket is now legally allowed to be part mushroom, and you will not find that on the front of the pack. The blend is roughly seventy beef, thirty fungus. Some versions run pea protein instead, or alongside. The mushroom is chopped fine, hydrated, and mixed through the trim until the texture and the colour match, and it matches well, because that is the entire engineering problem and it was solved years ago. It goes in the same tray. It sits in the same case. It carries a leaf and a word like blended, and blended is doing a great deal of work. Ground beef passed six dollars a pound in June for the first time on record. Beef and veal are forecast up 10.7 percent this year. The US cattle herd is at its lowest level in over seventy years and nobody expects relief before 2028. Ground beef is close to 48 percent of all the beef Americans eat. So the chains had two options. Charge what the beef costs and watch the shopper reach for chicken. Or cut it with something that costs a fraction of it, hold the shelf price, and keep the item in the basket. They went into the grinder because the grinder is the one place the eye cannot audit. A ribeye declares itself. Grain, marbling, fat cap, all of it visible, and nobody has ever tried to put a mushroom in one because you would find it in a second. Grind the same animal and the evidence disappears. Every food fraud in the record has gone the same route: the sausage, the pie, the patty, the ready meal. Horse turned up in mince and lasagne in 2013 and never once in a joint. The cruelty of the timing is that American ground beef should be the best it has been in fifty years. Cattle are being fed to record weights, an average of 1,475 pounds live in March, because heavier animals are the only way to hold production up with fewer head. Heavier cattle carry more fat. More fat means richer trim going into the grinder. The product was improving at the exact moment they started diluting it. And swap out that thirty percent and look at what leaves. Thirty percent less B12, less heme iron, less zinc, less complete protein, replaced by water bound into fungal fibre. You are buying the same weight and taking home less food. The blend was designed when beef was cheap and it was sold then as a choice for the planet. It is landing now because beef is dear, and not one word on the front of the pack has changed. The justification moved with the price, which tells you what the justification was. Ground beef was the last part of the animal a family could still afford whole. That is exactly why it went first.