Boil 1/4 litre of water, fat and salt. Add flour at once. Stir until the dough comes off the bottom as a dumpling. Stir in 1 egg immediately. Let the mixture cool down.
Stir in the remaining eggs one after the other, adding baking powder. Pour the dough into a piping bag with star-shaped spout. Spray small dots onto a baking tray lined with baking paper. Bake in the preheated oven (electric cooker: 225 ° C/ gas: level 4) for about 20 minutes. Do not open the oven door! Halve the cream puffs and let them cool down. In the meantime roast the hazelnuts until golden brown. Warm up the glaze in a washbath. Pull the strings over the lids. Whip cream and vanilla sugar until stiff for the filling.
In the meantime roast the hazelnuts until golden brown. Warm up the glaze in a washbath. Pull the strings over the lids. Whip cream and vanilla sugar until stiff for the filling. Also fill into a piping bag. Spray onto the bases. Sprinkle with hazelnuts, place lid on top and dust with icing sugar