Ah, thanks for correcting me. Going to leave my comment up for future context.

Otherwise it’s called Sour Mash.

Like they mention in the article, I also recommend the Uncle Nearest brand.

Uncle Nearest (his name was Nearest Green) was a slave who worked with Jack Daniels to create his famous whiskey. He was (I believe) the first black Master Distiller.

His descendants have created their own distillery. His great-great-granddaughter is now their Master Blender and man are those blends good. I went on the tour last year - highly recommend if you’re ever in Tennessee.

The Wikipedia Article on Nearest Green

Their website