Preheat the oven to 160C top / bottom heat
Lay out baking paper in the springform pan and cut the edges
Mix the powdered sugar and the ground hazelnuts
Beat the egg white together with the granulated sugar until firm
Carefully stir the powdered sugar and hazelnut mixture into the egg white
Pour the Dacquoise batter into the springform pan and distribute evenly.
Bake for 25 minutes and then leave to cool for 30 minutes
Info: Please don't be alarmed, your Dacquoise is a huge drama queen and will lead a life of its own in these 25 minutes. It will open and then collapse again - so don't worry, you're doing everything right!