Okay, so I may have missed this but I can't think of the scene in Batman v Superman: Dawn of Justice where this happened. I know when both Clark and Bruce were in Lex's house for an event, Clark could hear Bruce talking with Alfred about sabotaging Lex's computers so that gave away Bruce's identity as the Bat.
But what scene during the movie did Bruce know that Clark was Superman? I mean honestly the glasses really don't hide the secret for Clark, lol so maybe Bruce saw through that? I can't remember.
Any help is appreciated.