Chocolate & Coffee Cake with Coffee Mousse Topping

Personally, I like my chocolate cakes rich in flavour without being too heavy. This chocolate cake has a subtle coffee flavour, and the light and airy mousse topping is so delicious I could eat it on its own with a spoon! The mousse should ideally be in the refrigerator for 2 hours before it’s whipped up, so it’s important to start making it first. Then by the time the cake is prepared, baked and cooled down, it will be ready to spread. (Alternatively, it can be made the night before.) I li