Apricot Bars
["3/4 c. butter", "1/2 c. sugar", "2 egg yolks", "1 tsp. vanilla", "1 1/2 c. flour", "1/4 tsp. baking powder", "1/2 tsp. baking soda", "pinch of salt", "12 oz. apricot preserves", "2 egg whites", "1/2 c. sugar", "1/2 c. chopped nuts"]
["Butter and flour 9 x 13-inch pan.", "Mix first 8 ingredients together and spread into pan.", "Cover with apricot preserves.", "Beat egg whites and sugar until stiff and spread over apricot preserves.", "Top with nuts.", "Bake at 350\u00b0 for 35 to 40 minutes."]
["butter", "sugar", "egg yolks", "vanilla", "flour", "baking powder", "baking soda", "salt", "apricot preserves", "egg whites", "sugar", "nuts"]