Begin by adding your dark chocolate chips and 300ml of double cream to a microwaveable pyrex dish.
Place in the microwave and heat for 30 seconds, allow to stand for 10 seconds before removing and mixing thoroughly. Do not heat the chocolate and cream mixture for more than 30 seconds at a time!
Repeat twice or until the chocolate has completely combined with the cream
Gently whip the other 300ml of double cream with 1 tsp of vanilla extract until soft peaks form, be very careful to not overwhip the cream or else it will split.
Add the whipped cream to the chocolate mixture, optionally you can sweeten with date syrup, I used 2 tablespoons! Fold the mixture gently until combine.
Transfer the mousse to your glassware of choice, I used these 160ml glasses but you could just put the mousse in glass jars or bowls.
Refrigerate for 20 minutes and then top with grated dark chocolate!