The August 2009 Daring Bakers' challenge was hosted by Angela of A Spoonful of Sugar and Lorraine of Not Quite Nigella. They chose the spectacular Dobos Torte based on a recipe from Rick Rodgers' cookbook Kaffeehaus: Exquisite Desserts from the Classic Caffés of Vienna, Budapest, and Prague.
6 eggs, separated, at room temperature
1 1/3 c powdered sugar
1 t vanilla
2/3 c cornstarch
pinch of salt
Preheat the oven to 400, and line two cookie sheets with parchment paper or pan liners, then lightly grease them. Beat the egg yolks with 2/3 c powdered sugar and vanilla for a few minutes until thick and light yellow. Set aside, and clean your beaters. Whip the egg whites until soft peaks form, then sprinkle the remining sugar over the top. Beat another few minute until the eggs hold stiff peaks. Fold a big scoop of the whites into the yolks to lighten them, then fold in the rest, carefully. Sprinkle the cornstarch and salt over the top, and fold and fold, carefully, until everything is incorporated. Divide the batter evenly between the two cookie sheets and spread until even. Place one pan on the top and one pan on the bottom oven shelf, and bake 5 minutes. Switch, then bake 5 more, until lightly browned. Cool completely.
1 c powdered sugar
4 oz dark chocolate, chopped
2 stick butter, softened
Set a pan of water on to boil to use as a double boiler. Beat the eggs and sugar until pale and thickened in a metal bowl. Set the bowl over the boiling water, and beat the egg mixture with a whisk until it starts to thicken further. Whisk in the chocolate, and keep stirring for a few minutes until totally melted, 2-3 minutes. Remove from the heat and cool to room temperature.
Whisk in the softened butter a few tablespoons at a time until fully incorporated. If your buttercream i too loose, like mine was because it's 90 degrees in my kitchen, just stick it in the fridge it's thickened up a bit.
I edged mine with crushed pistachios.