Preheat the oven to 350°F (175°C). Grease and flour a cake pan.

In a mixing bowl, combine flour, sugar, cocoa powder, baking powder, and salt.

Add softened butter, eggs, hazelnut spread, and vanilla extract. Mix until smooth.

Pour the batter into the prepared cake pan and bake for 30-35 minutes.

Let the cake cool completely before frosting.

In a chilled bowl, whip heavy cream until soft peaks form.

Gradually add powdered sugar and hazelnut spread, mixing until well combined.

Spread the frosting over the cooled cake.