This woman cooks for Will Varner and his wife. Varner has "broke the cook" (i.e. trained her) to get up in the middle of the night to make his breakfast every day (313).
This entry refers to the "young men" who do or someday might court Linda Snopes (297). They exist both in fact - "half the football and baseball teams escort her home from school in the afternoon and squire her in gangs to the picture show during her junior and senior high school years" (299) - and in Flem's mind, as the threat to his control over his daughter and her potential inheritance.