01 - Combine chopped dark chocolate, milk chocolate, and unsalted butter in a heatproof bowl. Place the bowl over a saucepan with gently simmering water, stirring until the mixture melts and becomes smooth. Remove from the heat and fold in the heavy cream until fully incorporated. Allow to cool slightly.
02 - Line an 8-inch square pan with parchment paper. Pour the chocolate mixture into the pan and spread it evenly using a spatula.
03 - Sprinkle crushed pistachios, crushed digestive biscuits, and toasted coconut flakes over the chocolate base. Press gently with a spatula to secure the toppings.
04 - In a small saucepan, combine pitted dates, water, ground cardamom, and sea salt. Cook over low heat while stirring until the dates soften and absorb most of the liquid, approximately 5 minutes. Transfer mixture to a blender or use an immersion blender to puree until smooth.
05 - Dollop or swirl the date caramel onto the crunchy chocolate base in the pan.
06 - Refrigerate the pan for a minimum of 2 hours or until the dessert is fully firm.
07 - Lift the chocolate slab out of the pan using the parchment paper, then slice into bars or squares. Adorn each piece with edible gold leaf, chopped dried rose petals, and additional pistachios as desired before serving.