Place cottage cheese, avocado, cocoa powder, maple syrup, vanilla and milk of your choice in the bowl of a small food processor.
Pulse several times, then blend continuously for a few minutes until the mixture is completely smooth and whipped. You may need to scrape the sides with a spatula a few times. You shouldn't be able to see any white spots or curds.
Melt the chocolate chips in a microwave safe bowl in 15-30 second increments, mixing as you go until pourable.
Cool melted chocolate slightly and add to the cottage cheese mixture in the food processor. Blend together until completely smooth.
Transfer to 3 small glass jars, glasses or containers.
Refrigerate for at least 30 minutes to set. The mousse will firm up as it cools.
Top with whipped cream, fresh raspberries and shaved dark chocolate or enjoy on its own.