Outrageous Oreo Brownies

6 ounces butter
6 ounces semisweet chocolate chips
2 ounces unsweetened chocolate
2 large eggs
1 tablespoon vanilla extract
1 cup  granulated sugar
1/2 cup  all-purpose flour
1 1/2 teaspoons baking powder
2 teaspoons instant espresso powder (10 ml)
8 Oreo cookies, broken up




"Preheat the oven to 350º F (180 C). Line a 13×9 inch metal pan with foil and spray foil with cooking spray.
Melt the butter, 8 ounces semi-sweet chocolate chips and the unsweetened chocolate in a medium bowl over simmering water. Allow to cool slightly.
Stir (do not beat) eggs, vanilla, and sugar together in a large mixing bowl. Stir the warm chocolate mixture into the egg mixture and cool to room temperature.
Stir 1/2 cup of flour, the baking powder, salt and espresso powder together in another bowl then add to the cooled chocolate mixture. Toss the Oreo chunks and 4 ounces of chocolate chips in a medium bowl with remaining 2 tablespoon of flour, then add them to the chocolate batter. Pour into pan
Bake for 20 minutes, then rap the baking sheet against the oven shelf to force the air to escape from between the pan and the brownie dough. Bake for about 10 minutes more, or until a toothpick comes out clean. Do not overbake! Allow to cool, then chill brownies. Lift from pan and cut into squares."

http://simple-nourished-living.com/2009/05/outrageous-oreo-brownies-recipe/