A Passion for Baking Chocolate Mousse Melting Moments Makes 15 I first made these by chance: I was going to use buttercream as a filling but when I opened the fridge I noticed some little pots of mousse I’d made the night before, so I tried them instead. And my, do they work well: they are like the best Bourbons you’ve tasted. You will need to make the chocolate mousse well in advance.