Line an 8x8 inch baking pan with parchment paper, leaving some overhang for easy removal.
Melt white chocolate chips in a microwave-safe bowl in 30-second intervals, stirring between each, until smooth and completely melted.
Stir in vanilla extract and sea salt, then fold in dried cranberries and pistachios until evenly distributed.
Pour the mixture into the prepared pan and spread evenly with a spatula.
Refrigerate for at least 2 hours or until completely firm.
Remove from pan using the parchment paper overhang and cut into 24 squares or break into rustic pieces.
Store in an airtight container in the refrigerator for up to 2 weeks.