Preheat oven to 350°F. 13 ... another bowl, beat milk, cocoa, eggs, remaining 1/4 c. flour, vanilla and baking powder. Mix in chocolate pieces ... with icing if desired.
Beat eggs, add regular sugar, ... Immediately after removing brownies from oven, push miniature marshmallows down into the brownies. Mix powdered sugar, butter, vanilla and milk. Spread on cooled brownies.
Melt butter in heavy saucepan (2 quart or larger as brownies are prepared in saucepan), over ... in sugar and milk; cool. Add eggs, stirring ... heat and add powdered sugar; stir with wooden spoon ... minute to glossy smoothness.