Preheat oven to 350°F. In food processor, combine flour, sugar and salt. Pulse several times to mix. Add butter and pulse until butter is broken up and incorporated with the flour to form a crumbly mixture. In small bowl, combine egg yolks, milk and vanilla; add to flour mixture. Pulse until dough comes together.

Turn out onto waxed paper and form dough into one 10-inch log. Roll in colored sprinkles or sugars and chill several hours until firm.

Once chilled, slice into 1/4-inch slices and bake for 10-12 minutes or until golden.