Gâteau au Chocolat

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Gâteau au Chocolat
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125g dark chocolate
125g butter
3 egg whites
3 egg yolks
100g sugar
50g plain flour
icing sugar
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Set oven to 220℃.

Grease a 20cm round cake tin.

Place the chocolate and the butter into a bowl and set this over a pan of hot water on a low heat.
Stir with a spatula until smooth then remove from the heat. Mix the egg yolks.

In a medium bowl, whisk the egg whites and sugar until the mixture is stiff.

Fold in half the egg white mixture into the chocolate mixture. Repeat with the rest of the mixture.
Shift in the flour and mix gently.

Turn the mixture into prepared tin and bake in the oven for 10 minutes and turn down to 170℃ for 15 minutes.