01 - Place the chopped white chocolate in a heatproof bowl.
02 - In a small saucepan, heat the heavy cream and butter over medium heat until just simmering.
03 - Pour the hot cream mixture over the chopped chocolate. Let sit for 1 minute, then stir until smooth and glossy.
04 - Stir in the crushed freeze-dried raspberries until evenly distributed.
05 - Cover and refrigerate the mixture for at least 1 hour, until firm enough to scoop.
06 - Using a small spoon or melon baller, scoop out small portions and roll into balls with your hands. Place on a lined baking sheet.
07 - Freeze the rolled truffles for 15 minutes to firm up.
08 - Dip each truffle in the melted white chocolate coating, letting any excess drip off. Place back on the lined sheet.
09 - Immediately sprinkle each truffle with a pinch of crushed freeze-dried raspberries.
10 - Refrigerate for 15 minutes to set the coating before serving.