Mix the mascarpone cheese, coconut milk and coconut extract in a large bowl, using either a rubber spatula or your food processor.
Mix the heavy whipping cream with 3 table spoons of sugar and vanilla extract , using a hand mixer or a stationary mixer. Place the whipped cream in the refrigerator until you need it.
In another bowl combine egg whites and the rest of the sugar and mix on highest speed of your electric mixer until stiff, dry peaks form.
Add the whipping cream to the mascarpone mixture and carefully mix, using a rubber spatula. Then add the egg whites.
Be careful not to over mix.
Pour the mixture in the serving cups.
Make sure you serve the mousse cold.