From low-fat recipe website.
Preheat oven to 350*F.
Spray a 9x13 inch baking pan with cooking spray.
In a large saucepan over low heat, combine sweetened condensed milk, cocoa, and chips. Stir until chips are melted; remove from heat.
Stir in egg whites, flour, baking powder, and vanilla; mix well.
Turn into prepared pan.
Bake 20 minutes or until center is set. Cool.
Make icing: combine icing ingredients and mix until well blended.
Spread on cooled brownies.
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