In a large bowl, beat together the cream cheese and butter until smooth and creamy, about 2 minutes.

Add sugar and beat until fluffy, about 3 minutes.

Mix in egg yolks, vanilla extract, and salt until well combined.

Gradually add the flour, mixing just until incorporated.

Chill the dough for at least 2 hours before rolling out.

Preheat oven to 350°F. Roll the dough to 1/2 inch thickness on a floured surface.

Cut out cookies using cookie cutters and place them on a parchment-lined baking sheet.

Bake for 10 minutes or until edges are lightly golden.

Cool on wire racks before decorating or serving.