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BEAT egg whites with electric mixer on high speed until soft peaks form. Mix sugar and baking powder; gradually add to egg whites, beating until stiff and glossy. Gently stir in chopped cookies. Spread into lightly greased 9-inch pie plate.
BAKE at 350°F for 25 to 30 minutes or until lightly browned. Cool completely.
SPREAD whipped topping into crust; top with berries. Serve immediately.