Follow these steps to create your stunning Black Forest Swiss Roll Wreath:

1. Preheat Oven: Start by preheating your oven to 375°F (190°C). Line a baking sheet with parchment paper.

2. Prepare the Batter: In a bowl, whisk the eggs and granulated sugar until light and fluffy. This should take about 5 minutes.

3. Combine Dry Ingredients: In another bowl, sift together the flour, cocoa powder, baking powder, and salt.

4. Mix Ingredients: Gently fold the dry ingredients into the egg mixture, being careful not to deflate the batter. Add the vanilla extract and mix until just combined.

5. Spread Batter: Pour the batter onto the prepared baking sheet and spread it evenly. Bake for 10-15 minutes or until a toothpick inserted in the center comes out clean.

6. Cool the Cake: Remove the cake from the oven and let it cool in the pan for about 5 minutes. Then, transfer it to a wire rack to cool completely.

7. Prepare the Filling: While the cake cools, whip the heavy cream with powdered sugar until soft peaks form. Set aside.

8. Assemble the Cake: Once the cake is cool, place it on a clean kitchen towel. Spread the whipped cream evenly over the surface, followed by the cherries.

9. Roll the Cake: Carefully roll the cake from one end to the other, using the towel to help guide it. Wrap it tightly and let it chill in the fridge for about 30 minutes.

10. Shape into Wreath: Remove the rolled cake from the fridge. Slice the ends to create a clean edge. Then, gently shape the roll into a wreath by placing it on a serving platter.

11. Decorate: Top the wreath with additional whipped cream, chocolate shavings, and extra cherries. If desired, drizzle cherry liqueur over the top for added flavor.

By following these steps, you will create an impressive Black Forest Swiss Roll Wreath that will wow your guests!