To 350°F (175°C) and line a baking sheet with parchment paper.
In a large mixing bowl, cream together the softened butter and powdered sugar until light and fluffy.
Add in the vanilla extract and mix well.
In another bowl, whisk together the flour, cornstarch, and salt.
Gradually add the dry ingredients to the butter mixture, mixing until just combined.
The chopped cranberries, pistachios, and white chocolate chips.
Scoop tablespoon-sized portions of the dough onto the prepared baking sheet, spacing them about 2 inches apart. If desired, Sprinkle with course sugar prior to baking.
For 12-15 minutes, or until the edges are lightly golden. Let cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.
