Ingredients

  • 88 grams (approximately 3/4 cup) buckwheat flour
  • 37 grams (approximately scant 1/3 cup) cornstarch (or omit cornstarch and use 125 grams total buckwheat flour)
  • 120 grams (approximately 1 cup) almond flour
  • 60 grams (approximately 1/2 cup) unsweetened cocoa
  • 10 grams (2 teaspoons) instant espresso powder or coffee extract
  • 10 grams (2 teaspoons) baking powder
  • 4 grams (1/2 teaspoon) salt
  • 55 grams (2 ounces) unsalted butter
  • 125 grams (approximately 2/3 cup, tightly packed) organic brown sugar
  • 110 grams (2 large) eggs
  • 10 grams (2 teaspoons) vanilla extract
  • 100 grams (1 cup) walnuts, chopped

Method

  • Preheat the oven to 300 degrees.
  • Line a baking sheet with parchment.
  • In a medium bowl, mix together the buckwheat flour, cornstarch (if using), almond flour, cocoa, instant espresso powder (if using), baking powder and salt.
  • In the bowl of an electric mixer cream the butter and sugar for 2 minutes on medium speed.
  • Scrape down the sides of the bowl and the beater with a rubber spatula and add the eggs, coffee extract (if using) and vanilla extract.
  • Beat together for 1 to 2 minutes, until well blended.
  • Scrape down the sides of the bowl and the beater.
  • Add the flour mixture and beat at low speed until well blended.
  • Add the walnuts and beat at low speed until mixed evenly through the dough.
  • Divide the dough and shape 2 wide, flat logs, about 10 inches long by 3 inches wide by 3/4 inch high.
  • Make sure they are at least 2 inches apart on the baking sheet.
  • Place in the oven on the middle rack and bake 40 to 45 minutes, until dry, beginning to crack in the middle, and firm.
  • Remove from the oven and allow to cool for 20 minutes or longer.
  • Place the logs on a cutting board and carefully cut into 1/2-inch thick slices.
  • Place on two parchment-covered baking sheets and bake one sheet at a time in the middle of the oven until the slices are dry, 30 to 35 minutes.
  • Remove from the oven and allow to cool.