01 - Place the avocados, melted dark chocolate, cocoa powder, maple syrup, vanilla extract, sea salt, and coconut milk in a food processor or blender.
02 - Blend until completely smooth and creamy, scraping down the sides as needed to ensure uniform texture.
03 - Taste the mixture and adjust sweetness by adding more maple syrup if desired.
04 - Divide the mousse evenly among four serving glasses or bowls.
05 - Refrigerate for at least 1 hour to allow the mousse to set and flavors to meld together.
06 - Before serving, top each mousse with fresh berries, chopped nuts, and a mint leaf if using.