Vanilla Kipfl

Dough
Sift flour and salt together in a large bowl. Crumble yeast over flour. Add vanilla and butter. Cut in using a pastry blender or two knives, until the mixture is fine crumbs. Add egg yolks and sour cream. Blend well. Refrigerate overnight.
Next Day - divide dough into 6 equal parts. Dredge board with vanilla-scented powdered sugar and roll out dough until it is thinner than pie dough. Cut into pie-shaped wedges 2 1/2 x 5 inches. Put 1/2 - 1 tsp of filling at wide end of triangle. Rollup. Place on ungreased cookie sheet lined with parchment, point side down. Bake at 325 degrees 12-15 minutes. Finish off all 6 parts of dough. Filling will ooze out. Cool. Coat with vanilla-scented powdered sugar. If any filling is left, drop by teaspoons on parchment and bake same as kipfl.
These are called "widow's kisses". If you run short of filling, use a little apricot jam with some nuts added.

Filling:
With egg whites at room temperature, beat until soft peak stage. Add sugar gradually, followed by vanilla beating until stiff. Gently fold in walnuts.