Chocolate Biscotti

INGREDIENTS

• 2 cups all-purpose flour
• ½ cup unsweetened cocoa powder
• 2 tablespoons instant espresso powder
• ¾ teaspoon baking soda
• ½ teaspoon baking powder
• 1 teaspoon salt
• ¾ stick (6 tablespoons) unsalted butter, at room temperature
• 1 cup sugar
• 2 large eggs, lightly beaten
• 1 teaspoon pure vanilla extract
• 1 cup chopped almonds, blanched or unblanched (I subbed 1 cup chopped white chocolate)
• 4 ounces bittersweet chocolate, coarsely chopped, or ¾ cup store-bought mini chocolate chips
• Sugar, for dusting