Cold Dough Cookies

Combine flour, butter and Crisco and crumb the mixture as you would for pie crust.

Add egg yolks to top of flour mixture (do not mix yet; wait until ingredients are in the mix.)

Add 1/2 cup sour cream to flour mixture.

Add cake of yeast, 1 tablespoon sugar and vanilla to remaining sour cream in its container.

Mix until yeast is dissolved.

Add yeast mixture to flour mixture and stir by hand until dough is soft.

Place dough in airtight container overnight (covering dough with plastic bag works well.) Divide dough into 5 parts and add flour and plenty of sugar.

Roll with rolling pin to 1/8-inch thick (very thin); cut into triangles and add filling to wide section of triangle and roll as you would crescent rolls.

Roll in sugar and bake on ungreased cookie sheet at 350° for 20 minutes.