Prepare the Avocados: Cut the avocados in half, remove the pits, and scoop the flesh into a food processor or blender.
Blend: Add the cocoa powder, almond milk, maple syrup, vanilla extract, and salt.
Combine: Blend until completely smooth. You may need to scrape down the sides and add a little more almond milk if the consistency is too thick.
Chill: Spoon the mousse into individual serving bowls or glasses and refrigerate for at least 30 minutes to set.
Serve: Garnish with fresh berries, shaved dark chocolate, or a sprinkle of sea salt for an extra touch of elegance.