Scant milk means "milk just barely".
"Scant" is not a type of flour. "Scant" is a cooking term that means "almost" or "just slightly less than." A recipe would not call for "scant flour" but a "scant cup" or a "scant Tablespoon" of flour, meaning not quite a cup or not quite a Tablespoon.
A scant of sugar is a very small amount of sugar.
Ricky lee Jones is a scant singer....
Barely amounting to as much as indicated - example: a scant two hours; a scant cupful. Having an inadequate or limited supply - example - (usually followed by of ): scant of breath.
Onions were scant at the grocer's, again.
A scant of oil is...not enough, or barely a sufficient amount.
We were scant of breath after the lengthy climb.
scant 3/8 cup sugar
The marooned passengers were concerned by the scant food supplies on the island. The professor paid scant notice to the complaints about his teaching.
I could only find a scant amount of information on the topic.
Scant is an adjective meaning hardly adequate. This is why a 'scant week' is still a seven day week, but just barely so.
The food was scant for the complete group. It means the food was not enough for the group.