'Unleavened Bread' in the Bible

So Gideon went and prepared a young goat and unleavened bread from a half bushel of flour. He placed the meat in a basket and the broth in a pot. He brought them out and offered them to Him under the oak.

The Angel of God said to him, “Take the meat with the unleavened bread, put it on this stone, and pour the broth on it.” And he did so.

The Angel of the Lord extended the tip of the staff that was in His hand and touched the meat and the unleavened bread. Fire came up from the rock and consumed the meat and the unleavened bread. Then the Angel of the Lord vanished from his sight.