In a microwave-safe bowl, melt 2 cups chocolate chips with the whipping cream in 30-second intervals, stirring until smooth and glossy.
Blend freeze-dried raspberries into a fine powder. Stir into the melted chocolate mixture until well combined.
Use a cookie scoop to portion out the truffle mixture. Roll into walnut-sized balls. If mixture is too soft, chill for 10–15 minutes before rolling.
Melt the remaining 1 cup chocolate chips until smooth. Dip each truffle, then sprinkle crushed raspberries on top.
Allow truffles to set at room temperature or in the fridge. Store in an airtight container in the fridge for up to 1 week.