Steps
1. Preheat your oven to 350°F (175°C) and line a small baking sheet with parchment paper.
2. In a mixing bowl, whisk the eggs and granulated sugar until pale and fluffy.
3. Sift together the flour, cocoa powder, and baking powder, then gently fold it into the egg mixture.
4. Add the vanilla extract and mix until just combined.
5. Spread the batter evenly onto the prepared baking sheet and bake for 10-12 minutes, or until the cake springs back when touched.
6. While the cake is baking, whip the heavy cream with powdered sugar until soft peaks form.
7. Once the cake is baked, remove it from the oven and let it cool for a few minutes before flipping it onto a clean kitchen towel dusted with cocoa powder.
8. Peel off the parchment paper and carefully roll the cake up in the towel, starting from one end. Let it cool completely.
9. Once cooled, unroll the cake, spread the chocolate hazelnut spread evenly, and top with whipped cream.
10. Roll the cake back up without the towel, slice, and serve!