Using the bain marie method or a microwave melt the white chocolate, butter and 3 tablespoons of milk in a large bowl, mix until smooth.
In a blender or food processor add the skinned unsalted pistachios and blend until finely chopped, add the sugar and blend until very finely ground almost a powder. Add to the the bowl of melted chocolate and combine.
Pour back into the blender or food processor with 2-3 tablespoons of milk* and blend until smooth and creamy. I like to mix it until it's still has some finely chopped pistachios in the cream. Spoon into the clean sterilized jars. Enjoy!
