01 - Place the finely chopped white chocolate in a heatproof bowl and set aside while heating the cream mixture.
02 - In a small saucepan, combine heavy cream and butter over medium heat. Heat until just simmering, being careful not to boil the mixture.
03 - Pour the hot cream mixture over the chopped chocolate. Let sit undisturbed for 2 minutes to allow the chocolate to soften, then stir gently until completely smooth and fully melted.
04 - Fold the crushed freeze-dried raspberries into the chocolate mixture until evenly distributed throughout the ganache.
05 - Cover the bowl and refrigerate for at least 2 hours, or until the mixture is firm enough to hold its shape when scooped.
06 - Using a small spoon or melon baller, scoop portions of the chilled mixture and roll them into smooth balls between your palms. Place the formed truffles on a parchment-lined baking sheet.
07 - Return the shaped truffles to the refrigerator for 15 minutes to firm up before coating, ensuring they maintain their shape during dipping.
08 - Dip each chilled truffle into the melted white chocolate, allowing any excess coating to drip off. Return the coated truffles to the parchment-lined tray.
09 - While the chocolate coating is still slightly tacky, dust each truffle with powdered sugar. Optionally, sprinkle with additional raspberry powder for enhanced color and flavor.
10 - Allow the truffles to sit at room temperature until the chocolate coating is completely firm and set before serving or storing.