Chocolate oreo cake

For cake:
2 c. sugar
1-3/4 c. all-purpose flour
3/4 c. Hershey's Cocoa
1-1/2 tsp baking powder
1-1/2 tsp baking soda
1 tsp salt
2 eggs
1 c. milk
1/2 c. vegetable oil
2 tsp vanilla extract
1 c. boiling water
10-15 oreos twisted to separate cookies and reveal cream center
15 oreos, chopped directly in half through cookie

For icing:
1/2 c. (1 stick) butter, melted
2/3 c. Hershey's Cocoa
3 c. powdered sugar
1/3 c. milk
1 tsp vanilla extract

For filling:
1/3 c. whipping cream
2 tsp powdered sugar
small dash vanilla extract
1/8 c. oreo cookie crumbs, made from reserved oreo sides

Directions:
-Preheat oven to 350 degrees and prepare two 9-inch round baking pans, lining with parchment. -On one layer of cake, place cookie halves that have been separated into the bottom of one pan, cream side up. Repeat for second layer.
-Stir together sugar, flour, cocoa, baking powder, baking soda and salt in large bowl.
-Add eggs, milk, oil and vanilla; beat on medium speed of mixer 2 minutes.
-Stir in boiling water (batter will be thin).
-Pour batter very carefully into prepared pans.
-Bake 30 to 35 minutes or until wooden pick inserted in center comes out clean.
-Cool 10 minutes; remove from pans and place onto wire racks.
-Remove parchment and cool completely.

-Meanwhile, make frosting:
-Stir melted butter into cocoa.
-Alternately add powdered sugar and milk, beating to spreading consistency.
-Add small amount additional milk, if needed. -Stir in vanilla. (About 2 cups frosting.)

-Meanwhile, make filling:
In the bowl of an electric mixer, whip the cream, sugar and vanilla until stiff.
-Gently fold in the cookie crumbs.
-Scoop the mixture into a piping bag (or gallon sized ziploc bag).
-When cake is completely cooled, make icing dam around the top edge of the layer of cake that has oreos baked into it.
-Fill icing dam with a layer of cream filling.
-Place other cake layer on top, and frost with chocolate frosting.
-Place oreo halves around bottom edge and top of cake.
-Serve or store in refrigerator