5 ounce (142 gm) fine quality unsweetened chocolate, chopped
2¼ sticks (250gms) unsalted butter, softened
2¾ cups (355gms) sifted cake flour (if using all purpose flour then measure 2¾ cup AP flour and remove 5 tbsp of the AP flour and replace with 5 tbsp corn starch)
¼ cup (23gm) unsweetened cocoa powder (not dutch processed- if using dutch processed add a pinch of cream of tartar)
2 tsp baking soda
½ tsp baking powder
½ tsp salt
4 large eggs
1 cup (190 gm) granulated sugar
1 cup packed (158gm) light brown sugar
1½ tsp pure vanilla
2 cups sour cream
4 squares (4 ounce) semi-Sweet Chocolate ( I used bittersweet chocolate)
¼ cup (60gms) butter
1 8 oz pkg. (226 gm) cream Cheese, softened
½ cup (62gms) confectioners’ sugar
2 cups thawed COOL WHIP Whipped Topping
12 OREO Cookies, coarsely crushed (I used 13 and use a ziploc bag to crush the oreos)