Thelma's Chocolate Eclair

Line a 13x9-in. dish with half of the graham crackers, breaking crackers to fit as needed., Whisk milk and pudding mixes 2 minutes; let stand until soft-set, about 2 minutes. Fold in whipped topping; spread evenly over crackers. Top with remaining crackers., In a microwave-safe bowl, microwave chocolate and butter until melted; stir until blended. Stir in remaining ingredients. Spread over top. Refrigerate, covered, 8 hours or overnight.