The Ultimate Festive Christmas Yule Log Cake (Bûche de Noël)

Preheat your oven to 375°F (190°C). Grease a 10×15 inch jelly roll pan and line it with parchment paper. Grease the parchment paper as well to ensure easy release.

In a medium bowl, sift together the flour, cocoa powder, and salt. Set aside.

In a large bowl (or stand mixer), beat the egg yolks and 1/2 cup of the granulated sugar on high speed until the mixture is pale, thick, and ribbons fall from the beaters (about 3-4 minutes). Beat in the vanilla extract and melted butter.

In a separate clean, dry bowl, beat the egg whites and cream of tartar on medium speed until soft peaks form. Gradually add the remaining 1/4 cup sugar and continue beating until stiff, glossy peaks form.

Gently fold 1/3 of the egg whites into the yolk mixture to lighten it. Then, carefully fold in the remaining egg whites until just combined, being careful not to deflate the batter.

Gradually fold in the dry ingredients (flour mixture) in two batches, using a gentle over-under motion.

Pour the batter into the prepared pan and spread it evenly into the corners with an offset spatula. Bake for 12-15 minutes, or until the cake springs back when lightly touched.

While the cake bakes, lay a clean kitchen towel on the counter and dust it generously with powdered sugar or cocoa powder.

When the cake is done, immediately invert it onto the dusted towel. Peel off the parchment paper carefully. Starting at one short end, roll the hot cake up tightly with the towel inside. Let it cool completely in this rolled shape on a wire rack.

Make the filling: Heat the heavy cream until simmering, then pour over the chopped chocolate. Let sit for 5 minutes, then whisk until smooth. Refrigerate until thickened but spreadable, or whip it for a lighter texture.

Make the frosting: Beat the softened butter until creamy. Add powdered sugar and cocoa powder alternately with the heavy cream. Beat until fluffy and spreadable.

Assembly: Gently unroll the cooled cake. Spread the filling evenly over the surface, leaving a small border around the edges. Re-roll the cake without the towel. Place seam-side down on a serving platter.

Cut a small diagonal slice off one end of the log and attach it to the side of the main log using a bit of frosting to create a ‘branch’ effect.

Cover the entire cake with the chocolate frosting. Use a fork to drag lines through the frosting to resemble tree bark.

Dust with powdered sugar to look like snow and garnish with rosemary, cranberries, or meringue mushrooms before serving.