Rinse the stinging nettles thoroughly in a colander. In a large pot, bring water to a boil and add the nettles. Boil the nettles for about 2 minutes.
Bring back the cooked nettles to the colander and pour cold water on them. Now you will easily be able to touch the nettles without being stung.
Remove the stems and keep only the nettle leaves. Squeeze out the water from the nettle leaves and chop finely.
Mix flour, baking powder, vanilla sugar, and salt.
In another mixing bowl, whisk together the sugar and butter.
Add the eggs and nettles and mix.
Add the dry ingredients and mix well.
Pour the cake batter into a suitable cake pan covered with baking paper or greased with butter.
Bake the cake in the oven at 180 degrees Celsius or 350 degrees Fahrenheit for 25-30 minutes.
Remove the cake from the oven and enjoy!