Preheat oven to 350 degrees F. Line 2 baking sheets with parchment or lightly grease.
In the bowl of a stand mixer fitted with a paddle attachment or a large bowl, combine flour, sugar, and salt. Mix in the butter, egg yolks, and vanilla extract until well combined and dough comes together.
On a lightly floured surface, roll the dough into a thin rectangle, about 1/4 inch thick. If the dough is too difficult to roll, refrigerate 30 minutes to 1 hour. Cut the dough into circles with a 3 inch wide cookie cutter. Place the circles on prepared baking sheet about 1 inch apart.
Bake in preheated oven until lightly golden, 10-12 minutes. Allow to cool on baking sheet 10 minutes before removing to wire rack.