In large bowl add pudding to milk and beat 2 minutes. Add cool whip, beat 1 minute. Line 9x13 pan with whole graham crackers, pour half of pudding mixture over crackers. Lay another layer of crackers over pudding, pour remaining pudding over crackers. Lay third layer of graham crackers over pudding. Refrigerate for 1 hour and then spread frosting over crackers. Refrigerate for 1 day before serving.
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