Butter Pecan Cookies
["1 c. butter", "2/3 c. brown sugar", "1 egg yolk", "2 c. flour"]
["Cream together butter and sugar.", "Beat in egg yolk.", "Add flour. Roll dough into balls; place on ungreased cookie sheet, 2 inches apart.", "Press with back of floured fork in one direction to flatten.", "Top each with pecan pieces.", "Bake at 375\u00b0 for 9 to 10 minutes, until lightly browned around edges.", "Remove from pan while still warm."]
["butter", "brown sugar", "egg yolk", "flour"]