01 - Combine dark chocolate, milk chocolate, and unsalted butter in a heatproof bowl. Place the bowl over a saucepan of gently simmering water and stir until completely smooth. Remove from heat and fold in the heavy cream. Allow the mixture to cool briefly.
02 - Line an 8-inch square pan with parchment paper. Pour the chocolate mixture into the pan, spreading evenly with a spatula.
03 - Scatter crushed pistachios, digestive biscuit crumbs, and toasted coconut flakes evenly over the chocolate base. Press gently with a spatula to adhere.
04 - In a small saucepan, combine pitted Medjool dates, water, ground cardamom, and sea salt. Simmer over low heat, stirring, until dates soften and liquid is absorbed, about 5 minutes. Blend until silky smooth.
05 - Dollop or swirl the prepared date caramel atop the crunchy chocolate layer.
06 - Chill in the refrigerator for at least 2 hours or until the confection is fully set.
07 - Unmold and cut into bars or squares. Adorn with edible gold leaf, dried rose petals, and extra chopped pistachios before serving.