For those looking for a gluten-free gourmet recipe, or for hazelnut … and chocolate lovers. Make the cake batter by whipping egg-whites separately before adding them. Combine in chocolate chips and bake.
Separate egg-whites and egg yolks. Whip egg-whites.
Meanwhile, combine sugar and egg yolks until it whitens a bit and get a smooth texture. Add hazelnut powder and mix.
Melt butter in a bain-marie or in the microwave. add it to the batter and mix.
Then gently and little by little incorporate whipped egg-whites in the batter. Finally, add chocolate chips.
Bake for about 30 minutes Baking time depends on the size of your moulds, here a only 20 minutes were necessary. Check by inserting a knife blade, stop baking as soon as it comes out dry.