Now, let’s go through the steps to create your Gourmet Tiramisu Yule Log Cake. Follow these simple instructions closely for the best results:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Prepare a 15×10-inch jelly roll pan by lining it with parchment paper and spraying it lightly with cooking spray.

2. Mix Egg Mixture: In a large mixing bowl, beat the eggs and granulated sugar together using an electric mixer on high speed until the mixture is thick and pale. This should take about 5 minutes.

3. Incorporate Vanilla: Add in the vanilla extract and mix until combined.

4. Combine Dry Ingredients: In a separate bowl, sift together the flour, cocoa powder, baking powder, and salt.

5. Fold Mixtures Together: Gradually fold the dry ingredients into the egg mixture, being careful to maintain the airiness of the batter.

6. Bake the Sponge: Pour the batter onto the prepared jelly roll pan, spreading it evenly. Bake in the preheated oven for about 20-25 minutes, or until a toothpick inserted in the center comes out clean.

7. Prepare Coffee Syrup: While the cake is baking, in a saucepan, combine the brewed coffee, coffee liqueur, and sugar over medium heat. Stir until the sugar dissolves, then remove from heat and set aside to cool.

8. Remove and Cool Cake: Once the cake is done, remove it from the oven and cool in the pan for 5 minutes. Carefully invert it onto a clean kitchen towel dusted with cocoa powder. Peel off the parchment paper.

9. Roll the Cake: Starting from one end, roll the cake up tightly with the towel, creating a log shape. Allow it to cool completely while rolled.

10. Prepare Mascarpone Filling: In a separate bowl, whip the heavy cream until soft peaks form. Add the mascarpone cheese, powdered sugar, and vanilla extract; continue to whip until the mixture is smooth and creamy.

11. Unroll and Fill Cake: Once the cake has cooled, gently unroll it. Brush the coffee syrup over the entire surface of the cake. Spread a generous layer of the mascarpone filling over it, leaving a small border around the edges.

12. Re-Roll the Cake: Carefully roll the cake back up, this time without the towel. Place it seam-side down on a serving platter.

13. Chill the Cake: Cover the cake with plastic wrap and refrigerate for at least 1 hour to let it set.

14. Decorate the Cake: Once set, dust the top of the cake with cocoa powder and garnish with dark chocolate shavings or curls for an authentic Yule log appearance.

This step-by-step guide will help you create a stunning Gourmet Tiramisu Yule Log Cake that will delight everyone at your holiday gathering!