01 - Place dark chocolate, milk chocolate, and butter in a heatproof bowl. Set the bowl over a saucepan with gently simmering water, stirring until fully melted and smooth. Remove from heat and incorporate heavy cream. Allow mixture to cool slightly.
02 - Line an 8-inch square pan with parchment paper. Pour chocolate mixture into the pan, spreading it evenly.
03 - Distribute crushed pistachios, digestive biscuits, and toasted coconut flakes evenly over the chocolate base. Press gently with a spatula to embed toppings.
04 - In a small saucepan, combine dates, water, ground cardamom, and sea salt. Simmer over low heat with stirring until the dates are soft and water is mostly evaporated, approximately 5 minutes. Transfer mixture to a blender or blend directly until smooth.
05 - Dollop or swirl the pureed date caramel over the crunch-topped chocolate base.
06 - Refrigerate for a minimum of 2 hours, until completely set.
07 - Remove from the pan and slice into bars or squares using a sharp knife. Adorn with edible gold leaf, rose petals, and extra pistachios for presentation.