KFC’s “Original Recipe” trademark, which it says is a secret blend of 11 herbs and spices, has long been part of the company’s branding. The blend is closely guarded, and the company calls it one of the most “iconic trade secrets in the food industry.” It first trademarked the phrase in 1984.

You know, those coveted KFC 11 herbs and spices that nobody really knows any details on. The lawsuit was filed in Texas. In court documents, KFC says they sent a letter to Church’s on Oct. 24 objecting to their use of "original recipe," stating it infringed on KFC’s trademark.

Church's Chicken has recently begun advertising some new chicken, bragging about the fact that they've gone back to the "original recipe." This is famously what KFC calls its fried chicken, in reference to Harland Sanders' original recipe.