Triple-Chocolate Fudge Brownies

Directions

1. 1
   Preheat oven to 350F.
2. 2
   and butter and flour an 8-inch square baking pan, knocking out excess flour.
3. 3
   In a heavy 1 1/2-quart saucepan melt bittersweet and unsweetened chocolates and butter over low heat, stirring, until smooth and remove pan from heat.
4. 4
   Cool mixture to lukewarm and whisk in sugar and vanilla.
5. 5
   Add eggs, 1 at a time, whisking well until mixture is glossy and smooth.
6. 6
   Stir in salt and flour just until combined and stir in chocolate chips.
7. 7
   Spread batter evenly in pan and bake in middle of oven 25 to 30 minutes, or until a tester comes out with crumbs adhering to it.
8. 8
   Cool brownies completely in pan on a rack before cutting into 16 squares.
9. 9
   Brownies keep, layered between sheets of wax paper in an airtight container at cool room temperature, 5 days.