Buche Noël Cookies

Ingredients

For the Coating

• • • ½ cup / 62 grams cacao nibs
    • ½ cup / 105 grams Demerara sugar
    • Generous pinch of kosher salt

For the Dough

• • • 2½ cups / 320 grams all-purpose flour
    • 1 cup/110 grams powdered sugar
    • 3 tablespoons unsweetened cocoa powder
    • ½ teaspoon kosher salt (such as Diamond Crystal)
    • 12 tablespoons/170 grams unsalted butter, cut into pieces, chilled
    • 1 large egg
    • 2 tablespoons sour cream
    • 2 teaspoons vanilla extract

For Filling

• • 4 ounces semisweet or bittersweet chocolate, chopped
  • 6 tablespoons/85 grams unsalted butter
  • 2 tablespoons powdered sugar
  • 1 tablespoon all-purpose flour, plus more for work surface
  • 1 large egg, yolk and white separated
  • 1 teaspoon vanilla extract

Assembly – Process

• • Make the dough
  • Chill it, and then roll out to a 12″x 8″ rectangle
  • Spread with dark chocolate filling
  • Roll up like a Buche Noel.
  • Cut into 1-inch pieces.
  • Brush with egg white, and sprinkle with coating.
  • Bake at 350 for 15 minutes.