Line bottom of 9x13 dish with whole graham crackers. Pour pudding over crackers. Top with second layer of graham crackers. Make the chocolate sauce by mixing together cocoa, sugar and milk in a sauce pan. Bring to a boil and boil for one minute. Remove from heat. Stir in ¾ stick butter until melted. Pour over top layer of graham crackers. Chill 3-4 hours to soften crackers before serving.
Recipe by Preciously Paired at https://www.preciouslypaired.com/the-cake-that-endlessly-pleases/