Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
Butter in a dream is spoils, fertility, and lawful sustenance. Eating it indicates healing for the sick and blessing in sustenance.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
Butter indicates useful knowledge and abundant sustenance. For a student, it is success, and for a merchant, profit.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
Butter is interpreted as wealth collected from a lawful source. Whoever sees himself gathering butter is collecting money for his family.