Preheat oven to 350 degrees F
Mix together sugars, butter, vanilla and eggs until light and fluffy.
Mix in flour, baking powder and salt. Spread into an ungreased 9 x 13 pan, spread evenly.
Bake for 20 minutes or until golden brown and toothpick comes out clean. Cool
Melt butter over low heat, add in brown sugar and cook for 2 minutes. Stir constantly
Add in milk and cook until it comes to a rolling boil. Remove from heat.
Add in powdered sugar gradually and vanilla. Spread over brownies. Sprinkle with pecans.
Recipe from Betty Crocker