In a bowl over simmering water melt the chocolate and butter together (or this can be done safely in a microwave).

In a kitchen aid using a paddle attachment (or in a large bowl, using a whisk) slowly combine the eggs and sugar together until well incorporated.

Slowly add the melted chocolate and butter to the eggs and sugar and mix well on a medium speed (or by hand) until well combined.

Stop mixing and add all the flour into the mix.

Slowly fold the flour through but be careful to not over mix the mixture.

Chill the mixture in the fridge and then weigh your mixture evenly into pre buttered and cocoa powdered tin moulds.

Bake at 180C/Gas 4 for 8-9 minutes (if mix is weighed at 80g).

Dust with cocoa powder and serve.