My great-grandmother’s recipe; to try when back in Denver:
Combine in a bowl:
1 1/2 cups sifted flour
1 cup butter
1/2 tsp salt
Mix with fork or hands until mixture is crumbly.
In another bowl, beat the following:
3 egg yolks
3 tbsp cold water
3 tbsp vinegar
After beaten together, mix in 1 cup flour.
Combine the two mixtures in a bowl, and refrigerate overnight.
Roll out portions of dough on a lightly floured surface. Cut out shapes and fill centers; bake at 350-375 for 22 minutes.