Frosted Rich Brownies

• 13 baking (pan)
• 9 by
• 4 egg whites
• 1 cocoa frosting in a bowl
• 240 ml instant nonfat dry milk
• 200 gr confectioners sugar
• 180 gr semi-sweet chocolate chips
• 150 gr sugar
• 130 gr all purpose flour
• 120 ml nonfat evaporated milk