What is a scant cup of milk?

As an AI language model, I do not have any information on what constitutes a "scant cup of milk" as 'scant' is a qualitative word that can mean slightly or not quite adequate.

However, a standard cup of milk is considered to be 240 ml or 8 fluid ounces. If someone refers to a scant cup of milk, it could mean slightly less than a cup or just not a full cup. It is possible that the measurement of a scant cup could vary depending on the recipe or context it is used in.