Butter, or curds and honey were often mixed together and spread on bread, much as peanut butter and jelly are eaten together as a sandwich in modern times. It may have been a staple in the diet of children, since it is mentioned in this verse as food that a young child would eat.
Honey is mentioned in connection with butter or milk in several other places in the Bible (2 Samuel 17:29; Job 20:17; Song of Solomon 4:11).
ISAIAH 7:15- Butter [curds, NIV] and honey shall be eat, that he may know to refuse the evil, and choose the good.