Source  Taste of Home

Recipe Added:  11/17/2014

In a large bowl, combine flour and salt; cut in butter until mixture resembles coarse crumbs. In a small bowl, whisk the egg yolk, sour cream and vanilla; add to crumb mixture and mix well. Cover and refrigerate for 4 hours or overnight. Divide dough into thirds. On a lightly floured surface, roll each portion into a 10-in. circle. Combine the walnuts, sugar and cinnamon; sprinkle 1/4 cup over each circle. Cut each circle into 12 wedges.

Roll up each wedge from the wide end and place point side down 1 in. apart on greased baking sheets. Curve ends to form crescents. Whisk egg white until foamy; brush over crescents. Sprinkle with remaining nut mixture. Bake at 350° for 18-20 minutes or until lightly browned. Remove to wire racks to cool. Store in an airtight container. Makes 36.

1. http://www.tasteofhome.com/recipes/vanilla-walnut-crescents