Line a 20cm x 30cm lamington pan with foil, allowing edges to overhang slightly
Quickly dip ⅓ of biscuits into combined water and coffee. Place over base of prepared pan
Combine vanilla pudding mix, half the cream and half the milk in a small bowl, beat with an electric mixer for about 1 minute or until thick. Spread evenly over biscuit base
Dip half the remaining biscuits into water and coffee mixture. Place biscuits on top of vanilla pudding
Combine chocolate pudding mix, remaining cream and milk in a small bowl, beat with an electric mixer for 1 minute or until thick. Spread evenly over biscuits
Dip remaining biscuits into water and coffee mixture. Place over chocolate pudding
Combine chocolate and butter in a small heatproof bowl, stir over a pan of simmering water until chocolate is melted. Spread over biscuits. Refrigerate overnight
