When choosing cauliflower, look for large, firm heads that feel heavy for their size -- this indicates that they've been held in a cool, humid environment and haven't dried out.

The cauliflower heads should be composed of creamy white florets that are tightly packed together around a squat core. There should not be any soft, mushy or discolored spots on the florets, which may result from mishandling or a patch of rot.

If possible, look for cauliflower heads that are packaged with a few of large, green leaves still attached to the stem; they will protect the underside of the head.