Pecan Thins
["1 stick butter", "1 stick margarine", "1 c. sugar", "2 c. plain flour", "1 egg, separated", "2 tsp. vanilla", "1 c. pecans, finely chopped"]
["Cream butter and sugar.", "Add flour.", "Add egg yolk and vanilla. Batter will be stiff.", "Spread as thin as possible on 2 cookie sheets.", "Lightly beat egg white.", "Spread on top and sprinkle with nuts.", "Press in with hand.", "Bake 1 hour at 275\u00b0 or lower.", "Remove from oven and cut into squares immediately.", "Freeze well."]
["butter", "margarine", "sugar", "flour", "egg", "vanilla", "pecans"]