How many breasts does a chicken have?

Two. The chicken has a breastbone with a big ridge on it which clearly separates left from right.

Reference: Erin Cram, Grad student, Molecular and Cellular Biology, University of CA, Berkeley

A chicken has one anatomical breast. Not only do we eat them split, we buy them that way. When our eyes detect two pieces, it's an easy leap to human anatomy and to conclude that a package of 4 chicken breast pieces contains 4 chicken breasts (which are really 2 cut in half). So common is this confusion that the mistaken amount is now accepted usage in retail chicken dialect. That's why the recipes here have shelved the clumsy "2 chicken breast halves" and opted for "2 chicken breasts." When a whole breast is requested the term is "1 whole chicken breast, unsplit."

Well.. when I first saw the question, I thought its silly but then again I got confused trying to think of an answer.

Nice explanation Lotsaletters. I also agree with your answer.

Anyway, have you ever wondered how many calories are there in that chicken breast we are talking about?