1 lb. powdered sugar
1 c. unsweetened cocoa
1/3 c. milk
1 cube butter
1 tbsp. vanilla
1 c. chopped walnuts
1 1/2 c. miniature marshmallows

Place powdered sugar, cocoa, milk and butter in mixing bowl. Cook for 3 minutes. Remove bowl, mix with spoon to completely blend ingredients. Add vanilla, nuts and marshmallows. Pour into lightly buttered 8 inch pan and allow to cool in refrigerator about 40 minutes before serving.