In a bowl, beat egg whites until foamy. Gradually beat in 1 cup sugar until stiff peaks form; set aside. In another bowl, beat egg yolks until thick and lemon-colored, about 2 minutes. Gradually beat in remaining sugar; beat 2 minutes longer. Combine flour, cocoa and baking powder; add to egg yolk mixture alternately with water. Beat in vanilla. Gently fold in egg whites. Transfer to two greased 13-in. x 9-in. baking pans. Bake at 350° for 16-20 minutes or until a toothpick comes out clean. Cool on a wire rack. Spread each cake with ice cream. Drizzle with fudge topping; sprinkle with peanuts. Spread with whipped topping; sprinkle with cookies. Cover and freeze until firm. Remove from the freezer 15 minutes before serving.