(Adapted from Ina Garten)

1 pound unsalted butter
1 pound semisweet chocolate, chopped
6 ounces unsweetened chocolate, chopped
7 large eggs
2 tablespoons instant espresso powder
2 tablespoons vanilla
2 1/4 cups sugar
1 cup plus 1/4 cup all-purpose flour
1 tablespoon baking powder
1 teaspoon salt
4 cups chopped Oreo cookies about 50 cookies

Preheat the oven to 350°.

Butter and flour an 12″ x 13″ x 1″ baking pan. I like to use foil for ease of getting them out. In a heatproof medium bowl set over a saucepan of simmering water, heat butter, chopped semisweet and unsweetened chocolate until melted and smooth. Allow to cool slightly.

In a large bowl, whisk eggs, coffee, vanilla and sugar. Blend chocolate mixture into egg mixture; cool to room temperature.

In a medium bowl, sift together one cup flour, baking powder and salt. Add flour mixture to chocolate mixture. In a small bowl, stir Oreos and remaining 1/4 cup flour. Add Oreo mixture to chocolate mixture. Pour batter into baking pan and smooth top with a rubber spatula.

Bake 28-35 minutes or until a toothpick inserted 3 inches from center comes out clean with some crumbs attached; do not overbake. Allow to cool. Refrigerate to get clean cuts