popa: Do you have a source for that? I saw that you can make a siman in the tzura, but I haven’t seen that you can have the whole type of bread be your siman. Like that you only make whole wheat bread fleishig.
Similar to what itche is saying. I’m assuming corn bread looks a bit different than regular bread. If that’s true, and everyone in the house knows that the corn bread is fleishigs, than its fine.