Jam Cookies
["2 egg yolks", "2 egg whites (unbeaten)", "1 c. brown sugar", "1 c. butter, softened", "1 tsp. lemon juice", "1 tsp. vanilla", "2 c. flour", "strawberry or peach jam"]
["Combine egg yolks, brown sugar, butter, vanilla and lemon juice. Mix until well blended. Stir in flour. Chill dough for 1 hour or until firm. Shape rounded teaspoons of dough into walnut-size balls. Dip each ball into unbeaten egg white and place on ungreased baking sheet."]
["egg yolks", "egg whites", "brown sugar", "butter", "lemon juice", "vanilla", "flour", "strawberry"]