Ingredients

  • 1 23 cups all-purpose flour
  • 1 cup sugar
  • 13 cup unsweetened cocoa powder
  • 1 teaspoon baking soda
  • 12 teaspoon salt
  • 4 large eggs
  • 2 teaspoons vanilla extract
  • 1 14 cups semi-sweet chocolate chips (about 8 ounces)
  • 23 cup hazelnuts, toasted, husked, coarsely chopped
  • 13 cup finely chopped crystallized ginger
  • 6 ounces good-quality white chocolate, chopped (such as Lindt or Baker's)

Method

  • Preheat oven to 350F.
  • Line large baking sheet with parchment paper.
  • Sift first 5 ingredients into medium bowl.
  • Add 3 eggs and vanilla; beat until blended.
  • Stir in chocolate chips, nuts and crystallized ginger (dough will be firm).
  • Turn dough out onto floured surface.
  • Gather into ball.
  • Divide dough in half.
  • Roll each half into 12-inch-long log.
  • Transfer logs to prepared baking sheet, spacing 3 inches apart.
  • Flatten each to 2 1/2-inch-wide log.
  • Whisk remaining egg in small bowl to blend.
  • Brush logs with some of beaten egg.
  • Bake logs until golden and firm to touch, about 35 minutes.
  • Cool logs on baking sheet 15 minutes.
  • Reduce oven temperature to 325F.
  • Transfer logs to cutting board.
  • Using serrated knife, cut logs crosswise into scant 1/2-inch-wide slices.
  • Place slices, cut side down, on large baking sheets.
  • Bake until firm, about 15 minutes.
  • Transfer biscotti to racks and cool completely.
  • Stir white chocolate in top of double boiler set over barely simmering water until melted and smooth.
  • Remove from over water.
  • Place biscotti on rack set over baking sheet.
  • Using spoon, drizzle melted white chocolate decoratively in zigzag pattern over biscotti.
  • Let stand until chocolate is firm.
  • (Can be prepared ahead.
  • Store biscotti in airtight container at room temperature up to 2 weeks or freeze up to 1 month.)
  • Makes about 48.