1/2 cup hazelnuts
2 pounds bittersweet chocolate, finely chopped
6 ounces unsweetened chocolate, finely chopped
1/2 cup plus 3 tablespoons flour
2 3/4 teaspoons baking powder
1 1/4 teaspoons salt
6 tablespoons unsalted butter, at room temperature
2 1/4 cups sugar
5 large eggs, at room temperature
1/2 cup salted pistachios, chopped
1/2 cup chopped dried cherries