In medium bowl, beat together the butter, sugar, orange zest, and vanilla until light and fluffy.
Add eggs one at a time, beating well after each one.
In separate bowl, mix together the flour, baking powder, and salt.
Stir in the dry ingredients into the butter mixture and chill 30 minutes.
Preheat oven to 325 F.
Turn the dough onto a lightly floured surface and add white chocolate, craisins, and pistachios kneading them into the dough.
Divide in half, shaping each half into two flattened logs, about 12 inches long and 3 inches wide.
Place logs on a greased baking sheet at least 3 inches apart.
Bake 25-30 minutes, or until golden brown.
Cool 5 minutes.
Cut crosswise, on a diagonal, into 1-inch slices and arrange cut side down on the baking sheet.
Bake 8-10 minutes, flip to the other side and bake 5-8 minutes or until golden brown.transfer to racks to cool. Make about 24 cookies.