Dark Chocolate Orange Biscotti

Bahan-bahan (18 porsi)

• 2 and 1/3 cups (291g) all-purpose flour (spooned & leveled), plus more for work surface + hands
• 1 cup (200g) packed light or dark brown sugar
• 1 teaspoon baking powder
• 1/2 teaspoon ground cinnamon
• 1/2 teaspoon salt
• zest from 1 orange (about 2 scant Tbsp)
• 1/4 cup (4 Tbsp; 56g) unsalted butter, cold and cubed
• 3/4 cup (95g) chopped walnuts*
• 3 large eggs
• 2 Tablespoons (30ml) fresh orange juice
• 1 Tablespoon (15ml) canola or vegetable oil (or melted coconut oil)
• 1 teaspoon pure vanilla extract
• egg wash: 1 large egg beaten with 1 Tablespoon (15ml) milk or water
• two 4 ounce (226g) semi-sweet or bittersweet chocolate bars, coarsely chopped*