Tea Cookies
["3 sticks butter", "1 c. sugar", "2 egg yolks", "1 tsp. vanilla", "pinch of salt", "1 tsp. lemon juice", "3 3/4 c. flour"]
["Cream butter and sugar; add next 4 ingredients.", "Add flour and mix well.", "Roll in tiny balls; press thumb in center and fill with preserves, cherries, jam, jelly, nuts or chocolate chips.", "Bake at 350\u00b0 for 15 to 20 minutes."]
["butter", "sugar", "egg yolks", "vanilla", "salt", "lemon juice", "flour"]