Deep Chocolate Brownies

Directions

1. 1.

   Preheat oven to 350°F with rack in middle. Butter and flour a 13- by 9-inch baking pan.

2. 2.

   Melt butter and chocolate in a 3-qt heavy saucepan over low heat, stirring, until smooth. Remove from heat and cool to lukewarm. Whisk in sugar and vanilla. Whisk in eggs 1 at a time until mixture is glossy and smooth.

3. 3.

   Whisk together flour, cocoa powder, and salt, then whisk into chocolate mixture until combined.

4. 4.

   Spread in pan and bake until a pick inserted in center comes out with crumbs, 25 to 35 minutes. Cool completely.