Cold Dough
["2 c. flour", "1/2 lb. margarine", "1 egg yolk", "3/4 c. sour cream"]
["Mix flour and margarine into crumbs like pie crust.", "Add sour cream and egg yolk.", "Mix well.", "Put on floured wax paper and refrigerate overnight or at least 8 hours."]
["flour", "margarine", "egg yolk", "sour cream"]