Simmer the heavy cream gently in a small saucepan over low heat. Once warmed, remove from heat and add the softened butter, stirring until they're fully combined for a silky smooth mixture.
Combine the powdered freeze-dried blueberries into the cream and butter mixture. Mix until smooth and evenly colored, then set aside to cool while you prepare the chocolate.
Melt the chopped white chocolate carefully using a double boiler. Keep the heat low and stir occasionally, ensuring the temperature remains around 105°F to avoid scorching.
Match the temperatures by allowing the blueberry mixture to cool to around 105°F as well. Then, gently fold both mixtures together until thoroughly combined, creating a luscious truffle blend.
Cool the mixture to room temperature, then cover it with plastic wrap. Refrigerate for 2 to 3 hours, or overnight for firmer truffles, until ready to roll.
Stir the mixture occasionally with a fork during chilling. This helps prevent fat separation, ensuring a consistent and creamy texture for your truffles.
Scoop the firm mixture and roll it into 1-inch balls. If your hands get sticky, you can clean them with a paper towel or dust with powdered sugar for easier handling.
Dust each truffle ball thoroughly in powdered sugar to add a touch of sweetness and to keep them from sticking together. This delightful coating enhances both flavor and presentation.
Store your beautiful truffles in an airtight container in the fridge for up to one week or freeze them for longer storage. Serve chilled to enjoy the optimal flavor and creamy texture.