Number of People
With: Square cake
Heat oven to 180°C.
In double boiler over simmering water melt the butter and chocolate.
Remove the pan from heat and cool sightly. Stir in sugar, salt and vanilla. Mix in the eggs, one at a time. Stir until blended.
Add flour and cocoa. Beat until mixture is smooth, 30-60 seconds.
Bake in square tin for 30 minutes. Insert tooth in the middle and it should come out almost clean.