Ingredients

  • Whole unblanched almonds 3/4 cup (4 ounces; 100 grams)
  • Whole pistachios 1/3 cup (1.6 ounces; 50 grams)
  • Cold unsalted butter, cubed 7 tablespoons (3.5 ounces; 100 grams)
  • Granulated sugar 3/4 cup (5.25 ounces; 150 grams)
  • All-purpose flour 2 cups (8.8 ounces; 250 grams)
  • Anise seeds 1 tablespoon (0.3 ounces; 8 grams)
  • Baking powder 1 teaspoon (0.2 ounces; 6 grams)
  • Grated zest of 1 lemon
  • Pinch of salt
  • 2 large eggs
  • 1 large egg white, beaten

Method

  • Prepare the biscotti.
  • Preheat the oven to 300F (150C).
  • Spread the almonds and pistachios evenly on a baking sheet and place in the oven.
  • Toast for about 30 minutes, until they are golden brown.
  • You will be able to smell the nuts when they are ready.
  • A good test is to break a nut in half and check to see if it is light brown on the inside.
  • Toasting the nuts brings out their natural flavor.
  • Remove them from the oven and allow to cool completely on the baking sheet on a wire rack.
  • Place the remaining ingredients in a large mixing bowl and beat with an electric mixer on medium speed until well combined, about 5 minutes; the mixture will hold together in a soft dough.
  • Add the cooled toasted nuts and mix until they are evenly incorporated, about 1 minute.
  • If you are using a hand-held mixer, you may want to knead in the nuts by hand to avoid burning out the motor of the mixer.
  • Remove the dough from the mixing bowl and place on a very lightly floured work surface.
  • If the dough is sticky and hard to work with, it is too soft.
  • To fix this, flatten it into a disk, cover with plastic wrap, and place it in the refrigerator for a minimum of 1 hour.
  • (When the butter in the dough gets cold, the dough will stiffen.)
  • Remove from the refrigerator and proceed.)
  • Preheat the oven to 350F (175C).
  • Divide the dough into three equal pieces.
  • Use the palms of your hands to roll each piece on the lightly floured work surface into a rope 1 to 1 1/2 inches in diameter.
  • Each rope should be even and fit on your baking sheet lengthwise.
  • If the dough sticks to your hands or to the work surface as you are rolling it, dust it lightly with flour.
  • Roll firmly to remove any trapped air bubbles.
  • (At this stage, you can wrap the dough well in plastic wrap and freeze for up to two weeks.
  • Bring it back to room temperature before baking.)
  • Place two of the biscotti ropes on a parchment paper-covered baking sheet.
  • You will only have room for two because they spread as they bake.
  • With a pastry brush, lightly brush each rope with the egg white; this will add shine to the baked biscotti.
  • Bake until golden brown, about 30 minues.
  • Remove from the oven and let cool slightly on the baking sheet.
  • Use a serrated knife to slice the biscotti on a diagonal into 1/2-inch thick cookies.
  • If you do this while the biscotti are still warm, they will not crumble.
  • The biscotti will harden as they cool.
  • If they are still soft when you slice them, place the slices on a baking sheet and bake at 300F (150C) for another 10 to 15 minutes.
  • Repeat the baking and cooling procedure with the remaining biscotti rope.
  • Store in an airtight container at room temperature for two to three weeks.