Head cheese the stock as a binder. Head cheese may be flavored with onion, black pepper, allspice, bay leaf, salt, and vinegar. It is usually eaten cold or at room temperature. Historically, meat jellies were made of the cleaned (all organs removed) head of the animal, which was simmered to produce stock, a peasant food made since the Middle Ages. When cooled, the stock congeals because of the natural gelatin found in the skull. The aspic may need additional gelatin, or more often, reduction, to set properly. The term 'head cheese' is used in North America, 'potted heid' in Scotland, 'brawn' elsewhere
What Love Is Made Of extremely positive about "What Love Is Made Of", describing it as "darker than anything" from "On a Mission", while calling it "slinky". The reviewer went on to commend the "irresistibly pouty" chorus. Pitchfork Media's Katherine St. Asaph commented that, in the song, the singer "sound[ed] completely enthralled, by either her lover or the music" and complimented her voice, noting that it seemed "ten times bigger than before". Jordan Sargent of "Spin" magazine called the track "exuberant" and highlighted Katy's vocal performance, which he deemed "typically fantastic", while the team from pop music website Popjustice gave "What Love Is Made Of"