Heat oven to 350*f.in 9#9 inch pan with wax paper.
Mix flour ,brown sugar,cocoa,baking soda and salt in bowl.
Stir in remaining ingredients except chocolate chips and powdered sugar.
Sprinkl chocolate chips over batter.
Bake for 25-30 minutes or until toothpick inserted in center comes out clean.
After cool it sprinkle with powdered sugar