Yule Log Cake

Yule log cake, or buche de Noel in its proper French name, is the Christmas cake that has been traditionally served in France since the 19th century. This recipe covers the sponge itself, which is the structural backbone of the finished log. A whole-egg genoise baked thin in a jelly-roll pan becomes the rollable canvas for whatever filling and frosting you layer on top.

The whipped-egg base is the whole trick. Beat eggs and sugar for a full five minutes at high speed until the mixture doubles in volume and falls from the beater in thick ribbons. That aeration is the only leavening this cake gets. No baking powder, no baking soda. All lift comes from air bubbles trapped in whipped eggs.

Folding the sifted flour mixture into the eggs (one third at a time, gently alternating with melted butter) preserves those bubbles. Stir vigorously and the whole thing deflates into a flat crepe. A rubber spatula cutting down, across the bottom, and up the side is the classic fold.

The browned butter painted on the parchment is a quietly brilliant step. It adds a nutty aroma and gives the cake a slightly crisp surface that makes rolling easier.

Do not overbake. 12 to 15 minutes max. A dry sponge cracks during the roll and ruins the whole dessert.

Chef Tips

• Room-temperature eggs whip higher than cold ones. Pull them out an hour before baking.
• Sift the flours even if the package says pre-sifted. Airy flour folds in cleanly without creating lumps.
• Roll the cake in a clean towel dusted with powdered sugar while still warm from the oven. This “pre-trains” the cake into the log shape and it will hold the roll after filling.
• Cool the rolled cake completely before unrolling, filling, and re-rolling. Warm cake sweats and turns gummy.

Variations

• Fill with whipped cream and crushed chestnuts for a classic French filling, or chocolate mousse for decadence.
• Frost with chocolate buttercream and drag a fork through it to mimic bark for the traditional wood-log look.
• Decorate with marzipan mushrooms, a dusting of powdered sugar “snow," and cranberries as holly berries.