In a microwave-safe bowl, combine white chocolate chips and heavy cream. Heat in 15-second increments, stirring between each until melted and smooth.
Mix the dried raspberry powder into the melted white chocolate until fully combined.
Chill the mixture in the refrigerator for 10 to 15 minutes until firm but pliable.
Scoop portions with a small cookie scoop and roll into smooth balls using clean hands.
Place rolled truffles on a parchment-lined baking sheet.
In a separate bowl, melt the dark chocolate chips in 15-second increments, stirring in between until smooth.
Dip each truffle into the melted dark chocolate, coating fully. Let excess chocolate drip off and scrape bottom of fork against bowl to remove extra.
Return coated truffles to the parchment paper and chill in the fridge for 10 minutes to set.
Place remaining melted dark chocolate into a piping bag or Ziplock bag and drizzle over the truffles.
Sprinkle additional raspberry powder over the drizzled chocolate.
Chill the truffles for up to 10 minutes before serving.