Process all ingredients in the small bowl of a food processor into a smooth consistency (double batch if you only have a large processor, or use an immersion blender instead since it's a small batch recipe). Note: depending on size / ripeness of avocado the consistency can vary slightly. If it seems a bit too runny, add a touch more cocoa powder. If too solid, add a touch of plant-based milk or a bit more avocado. Enjoy as an instant chocolate mousse or use as frosting as needed.