Rocky Road Cake
["1/2 c. all-purpose flour", "1 3/4 c. sugar", "1/2 tsp. salt", "4 eggs", "1 tsp. vanilla", "1 c. chopped walnuts", "1 c. melted margarine", "4 c. miniature marshmallows", "1 c. brown sugar", "1/3 c. milk", "1/4 c. margarine", "1 c. powdered sugar"]
["Sift together flour, sugar and salt.", "Add eggs and vanilla. Add walnuts.", "Fold in melted margarine.", "Pour into a greased and floured 9 x 13-inch pan.", "Bake 40 minutes at 350\u00b0.", "Remove from oven and immediately sprinkle with marshmallows."]
["all-purpose", "sugar", "salt", "eggs", "vanilla", "walnuts", "margarine", "marshmallows", "brown sugar", "milk", "margarine", "powdered sugar"]