Dark Chocolate Crackles

Bahan-bahan (60 porsi)

• 2½ cups all purpose flour
• 1 teaspoon baking soda
• ¼ teaspoon salt
• 1 cup (2 sticks) unsalted butter, (at room temperature)
• 2 cups firmly packed light brown sugar
• ⅔ cup unsweetened cocoa, (sifted)
• 2 teaspoons finely grated orange zest
• 1 teaspoon vanilla extract
• 3 large eggs
• 8 ounces bittersweet chocolate, (melted and cooled until barely warm)
• ¾ cup (4 ounces) chopped chocolate ((white, bittersweet or semisweet))
• ⅓ cup granulated sugar, ((more as needed))