01 - Combine dark chocolate, milk chocolate, and unsalted butter in a heatproof bowl. Place the bowl over a saucepan of gently simmering water, stirring until ingredients are fully melted and smooth. Remove from heat and blend in heavy cream. Allow to cool slightly.
02 - Line an 8-inch square pan with parchment paper. Spread cooled chocolate mixture evenly in the prepared pan.
03 - Scatter crushed pistachios, digestive biscuit crumbs, and toasted coconut flakes across the chocolate base. Using a spatula, press down gently to embed the crunch layer.
04 - In a small saucepan, combine Medjool dates, water, ground cardamom, and sea salt. Cook over low heat, stirring continuously, until dates are softened and water is nearly absorbed, about 5 minutes. Transfer mixture to a blender and puree until completely smooth.
05 - Dollop or swirl the date caramel across the crunchy chocolate base.
06 - Refrigerate for a minimum of 2 hours, ensuring the dessert is firm and set.
07 - Remove dessert from pan, cut into bars or squares, and garnish with edible gold leaf, dried rose petals, and extra chopped pistachios prior to serving.