Rocky-Road Bars
["1/2 c. butter", "1 c. sugar", "1 egg (whole)", "2 eggs, separated", "1 1/2 c. flour", "1 tsp. baking powder", "1/4 tsp. salt", "1 c. walnuts, chopped", "1/2 c. chocolate chips", "1 c. miniature marshmallows", "1 c. brown sugar, packed"]
["Cream butter and sugar.", "Beat in whole egg and 2 egg yolks. Sift flour, baking powder and salt together.", "Combine the two mixtures and blend thoroughly."]
["butter", "sugar", "egg", "eggs", "flour", "baking powder", "salt", "walnuts", "chocolate chips", "marshmallows", "brown sugar"]