Correct me if I am wrong, but essentially this is the gist of the issue.
Under USDA regs, the minimum percentage of beef meat in a product allowed to be called “ground beef” is 40%. The remaining 6-% can be fat, extenders, whatever.
Let’s call that product “Ground Beef A.”
I can tell people that I start with 100% “Ground Beef A” to make my taco filling, to which I then add flavorings, fillers and water so that the final percentages in my taco filling are 88% “Ground Beef A” and 12% seasonings. I call this mixture “Seasoned Ground Beef.”
However, the percent of total beef meet in the new product is now 88% of the original 40%, or 35.2% beef meat.
So the product known as “Seasoned Ground Beef” does not meet the USDA regulations to be labeled as a ground beef product if it is sold under certain conditions.
If you have three products, with the only difference between them being the type of filling (i.e. one chicken, one steak, and one “Seasoned ground beef”) the type of filling is a distinct and separate ingredient, prepared and handled as a distinct individual separate ingredient.
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I have to come down on the side that says that the practice is deceptive.
Of course the simple solution to the problem would be for Taco Bell to switch to a base beef mixture that is 46% beef meat. Then the final percentage of beef in the taco filing would be exactly 40%.