Preheat your oven to 350°F (175°C). Grease a 9x13 inch baking pan.
In a large bowl, cream together the butter and sugar until light and fluffy.
Add the eggs one at a time, beating well with each addition, then stir in the vanilla.
Combine the flour, baking powder, baking soda, and salt; stir into the creamed mixture alternately with the milk and sour cream.
Fold in the 10 crushed cookies.
Spread the batter evenly into the prepared pan.
Bake for 30 minutes in the preheated oven, or until a toothpick inserted into the center of the cake comes out clean.
Let the cake cool completely.
In a medium bowl, whip the heavy cream with the powdered sugar until stiff peaks form.
Spread the whipped cream over the cooled cake and sprinkle with the remaining crushed cookies.