DY – You posted the following: “One of the national hashgachos used to give hechsheirim to milchigs hot dog and hamburger buns. At this point, only the Triangle-K does that.
Why would someone think that’s muttar? (Y.D. 97)”
I agree with your question because when I first read this I thought it was saying milchig hot dogs and milchig hamburger buns, but then I realized that the hot dog buns are milchig and so are the hamburger buns (and not the hot dogs or hamburgers themselves). Just you obviously wouldn’t want to put fleishig hamburgers or hot dogs in them, pareve ones are OK or any other non-fleishig food that you might want to put into such a roll.