1. Melt the Chocolate Dream: Start by placing your finely chopped dark chocolate into a heat-safe bowl. In a small saucepan, gently warm 1 1/4 cups of the heavy cream over medium-low heat until it's just steaming – no need to boil! Carefully pour this warm cream over the chocolate. Let it sit for about 5 minutes to soften, then whisk until it's wonderfully smooth and glossy. Set this aside to cool down a bit.
2. Craft the Velvety Base: In a separate bowl, combine the egg yolks and granulated sugar. Using an electric mixer, whisk on high speed for 3 to 5 minutes. You'll see it transform into a thick, pale yellow, and creamy mixture. Stir in the pure vanilla extract, a pinch of salt, and if you like, the optional orange liqueur. Now, gently add about one-third of this airy egg mixture into your cooled chocolate mixture, stirring until just combined. Then, fold in the remaining egg mixture until everything is perfectly smooth.
3. Fold in the Fluffiness: In a clean bowl, whisk the remaining 1 1/4 cups of heavy cream with an electric mixer on high speed until beautiful, stiff peaks form. This usually takes another 3 to 5 minutes. Carefully fold this light, whipped cream into your chocolate mixture until it's airy and evenly blended. Be gentle to keep that lovely mousse texture!
4. Chill to Perfection: Spoon the fluffy mousse into individual cups or elegant ramekins. Pop them into the refrigerator for at least 6 hours, or even better, let them chill overnight. This essential step ensures your mousse sets perfectly and develops its full, creamy flavor.
5. Serve with Love: When you're ready to indulge, top each serving with a dollop of fresh whipped cream and a sprinkle of chocolate shavings. Enjoy this easy, elegant, and perfectly balanced sweet treat with your loved one!