Melt the dark couverture chocolate and butter using a double boiler or microwave.

Add sugar and eggs to the melted mixture and mix well.

Sift the cake flour and cocoa powder.

Combine the sifted dry ingredients with the wet mixture and pour into a baking pan.

Cut Oreo cookies in half and place them on top of the batter. Optionally, add crushed Oreos into the batter for extra sweetness.