Guiness Chocolate Mousse

Name: Guiness Chocolate Mousse
Prep time: 15 min
Total time: 15 min
Cuisine: European, Mediterranean, French
Ingredients: 1 cup Semi-Sweet Chocolate Chips; ⅓ cup Guiness Stout or any other Dark Stout you prefer; 1 teaspoon Instant Espresso Powder or ¼ cup of strong brewed coffee; 2 tablespoons Sugar; ½ teaspoon Salt; I Egg Yolk; 1 ½ cup Whipping Cream; 2 teaspoons Vanilla; 2 tablespoons Powdered Sugar