1/3 cup Dutch-processed cocoa
1 1/2 tsp. instant espresso (optional)
1/2 cup plus 2 tbsp. boiling water
2 (1 oz. ea.) sq. unsweetened chocolate, finely chopped
4 tbsp. (1/2 stick) unsalted butter, melted
1/2 cup plus 2 tbsp. vegetable oil
2 large eggs
2 large egg yolks
2 tsp. vanilla extract
2 1/2 cups sugar
1 3/4 cups unbleached all-purpose flour
3/4 tsp. table salt
6 oz. bittersweet chocolate, cut into 1/2-inch pieces

Adjust oven rack to lowest position and heat oven to 350°F.

Prepare foil sling (for easy removal): Cut 18-inch length foil and fold lengthwise to 8-inch width. Fit foil into length of 13x9-inch baking pan, pushing it into corners and up sides of pan; allow excess to overhang pan edges. Cut 14-inch length foil and fit into width of pan in the same manner, perpendicular to the first sheet (if using extra-wide foil, fold second sheet lengthwise to 12-inch width). Spray with non-stick cooking spray (Pam).

Whisk cocoa, espresso powder (if using), and boiling water together in large bowl until smooth. Add unsweetened chocolate and whisk until chocolate is melted. Whisk in melted butter and oil (mixture may look curdled). Add eggs, yolks, and vanilla and continue to whisk until smooth and homogeneous. Whisk in sugar until fully incorporated. Add flour and salt and mix with rubber spatula until combined. Fold in bittersweet chocolate pieces.

Scrape batter into prepared pan and bake at 350°F until toothpick inserted halfway between edge and center comes out with just a few moist crumbs attached, about 30 to 35 minutes. Transfer pan to wire rack and allow to cool for 90 minutes.

Using foil overhang, lift brownies from pan. Return brownies to wire rack and let cool completely, about 1 hour.

Cut into 2-inch squares and serve... Hide them somewhere safe... They are most good!

Submitted by: JW