Chocolate Souffle

1.    Preheat oven to 180°C/ 160°C fan forced. Brush 4 x 1 cup (250mL) capacity soufflé dishes with butter. Coat with sugar, tapping out excess; place on a baking tray.
2.    In a large heatproof bowl, add NESTLÉ Royal, vanilla, and ¼ cup (60mL) water; microwave uncovered on MEDIUM (50%) for 1 minute; stir. Repeat process in 30 second intervals until melted and mixture is smooth. Cool.
3.    Stir egg yolks into cooled chocolate mixture until well combined. Set aside.
4.    In a large bowl, using an electric mixer, beat egg whites and cream of tartar for 2 minutes or until soft peaks form. Gradually add extra sugar and beat for 5 minutes or until stiff peaks form.
5.    In two additions, gently fold egg-white mixture into Chocolate mixture; using a rubber spatula, repeat with remaining egg whites. 
6.    Carefully divide mixture to dishes; smooth top. Bake soufflé for 15-20 minutes or until puffed and set.  (Do not open oven during first 10 minutes of baking.) Serve immediately.