1/2 cup unsalted butter, plus more for dish |
3 ounces bittersweet chocolate, coarsely chopped |
1 cup sugar |
2/3 cup all-purpose flour |
1/4 cup unsweetened dutch-processed cocoa powder |
2 large eggs |
1 teaspoon grated peeled fresh ginger |
1/2 teaspoon pure vanilla extract |
1/2 teaspoon ground nutmeg |
1/2 teaspoon ground ginger |
1/4 teaspoon coarse salt |
1/8 teaspoon ground cloves |