Creating the Chocolate Yule Log can be straightforward if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Line a 15×10-inch jelly roll pan with parchment paper, allowing some overhang for easy removal.
2. Mix Dry Ingredients: In a bowl, sift together the flour, granulated sugar, cocoa powder, baking powder, and salt.
3. Whisk Eggs: In a separate bowl, beat the eggs until frothy. Add the vanilla extract and water, mixing until combined.
4. Combine Mixtures: Gradually add the dry ingredients to the egg mixture, stirring until smooth and well combined.
5. Spread Batter: Pour the batter into the prepared pan, spreading it evenly.
6. Bake: Bake in the preheated oven for 12-15 minutes, or until the cake springs back when lightly touched.
7. Cool: Remove the cake from the oven and let it cool in the pan for 5 minutes. Invert the cake onto a clean kitchen towel dusted with powdered sugar, then carefully peel off the parchment paper.
8. Roll the Cake: While the cake is still warm, roll it tightly with the towel from the short end. Allow it to cool completely while rolled.
9. Prepare Filling: In a microwave-safe bowl, heat the heavy cream until hot but not boiling. Pour it over the chopped chocolate and let it sit for a minute. Stir until smooth to create a chocolate ganache.
10. Unroll the Cake: Once the cake is cool, gently unroll it. Spread the chocolate ganache evenly over the surface, leaving a small border.
11. Re-roll the Cake: Carefully roll the cake back up without the towel. Place seam-side down on a serving platter.
12. Decorate: Use any remaining ganache to frost the outside of the log. Dust with powdered sugar and decorate with chocolate shavings or berries, if desired.

These steps will guide you in creating this incredible Chocolate Yule Log effortlessly.