Add all of the ingredients for the mousse into a bigger bowl and beat with a hand mixer or whisk until you get a smooth and fluffy mass.
Add the chocolate and instant coffee to a small bowl and pour a little bit of boiling water over it.
Stir until you get a smooth mass.
☝︎ You may want to chop the chocolate into smaller pieces before pouring the water over it - this way it will dissolve more easily.
Pour the chocolate-coffee-mixture into the bowl with the mascarpone and beat again briefly until everything is mixed.
Fill the mousse into a small jar and let it chill in your fridge for at least 30 minutes before enjoying it.
Cover the jar with plastic wrap or a lid and store it in your fridge.
The mousse will be good for at least 3-4 days.
Serving Size 1/2 jar
Servings 2
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.