In a medium, microwavable bowl, melt the white chocolate, stirring once, for about 45 seconds. Stir in the raisins, dried cranberries, peanuts and cashews.
Spoon the mixture into 2 flexible ice cube trays, whacking the trays on the counter to remove any air pockets and to level out the mixture. Refrigerate until set, about 30 minutes. Flex the trays to remove the candies.