1/2 cup (1 stick) unsalted butter, diced
3 1/2 cups bittersweet chocolate chips (about 21 ounces), divided
2 ounces unsweetened chocolate, chopped
2 large eggs
1/2 cup super fine sugar
1/2 cup (packed) dark muscovado sugar
1/4 teaspoon sea salt
1 tablespoon finely grated orange peel
3/4 cup all purpose flour
1/2 cup dried cranberries
1/3 cup shelled unsalted natural pistachios
1/4 cup chopped crystallized ginger
2 ounces high-quality white chocolate chopped