Ingredients

  • 1 cup almonds, sliced and blanched
  • 2 tablespoons granulated sugar
  • 1 cup confectioners' sugar, plus more for dusting
  • 3 large egg whites
  • 1 pinch salt
  • 12 teaspoon pure vanilla extract
  • 1 lemon, zest of, plus
  • 1 teaspoon fresh lemon juice
  • 6 tablespoons heavy cream
  • 23 cup chopped bittersweet chocolate
  • 1 teaspoon instant espresso powder

Method

  • Process almonds and 1 tablespoon granulated sugar in a food processor until finely ground.
  • Transfer to a medium bowl; stir in confectioners' sugar.
  • Put egg whites and salt into bowl of mixer and using whisk beat on medium until soft peaks form.
  • Add remaining granulated sugar; beat until stiff peaks form.
  • Mix in vanilla and lemon juice.
  • Fold in almond mixture in 2 batches.
  • Stir in zest.
  • Preheat oven to 300 degrees.
  • Put batter in a pastry bag fitted with a 1 1/2- inch round tip; pipe 2-inch rounds onto a nonstick baking sheet.
  • Bake until golden and set, about 15 minutes.
  • Let cool on a wire rack.
  • Bring cream to a boil in a pan.
  • Pour over chocolate and espresso in a heatproof bowl; whisk.
  • Freeze, stirring, until thick, 6 minutes.
  • Spread 2 teaspoons filling onto bottom of half of the cookies.
  • Sandwich with remaining cookies.
  • Dust with confectioners' sugar.