In a large bowl, cream butter with powdered sugar.

Mix in egg, vanilla, malt extract, and then flour.

Chill one hour in refrig.

Preheat oven to 350°F.

Lighty grease cookie sheet.

On a flat suface, roll dough 1/8 inch thick.

Shape cookies with a 2 1/2 inch square cooke cutter with a serrated edge.

Arrange on cookie sheet, bunch with milk and sprinkle with coarse sugar.

Bake 8 minutes, then transfer to wire racks to cool.