PREHEAT oven to 350°F. Beat cake mix, water, oil and eggs in large bowl with electric mixer on low speed until moistened. Beat 2 min. on medium speed. Stir in 1/2 cup of the chopped cookies. Pour evenly into 2 greased and floured 9-inch round cake pans.
BAKE 25 to 30 min. or until toothpick inserted in centers comes out clean. Cool in pans on wire racks 10 min.; remove from pans. Cool completely.
ADD 1 cup of the chopped cookies and the sliced strawberries to whipped topping in large bowl; stir gently. Place 1 of the cake layers on serving plate; spread with half of the whipped topping mixture. Cover with second cake layer; spread top with remaining whipped topping mixture. Sprinkle with remaining chopped cookies just before serving. Garnish with whole strawberries. Store in refrigerator.