Using a high-powered blender (if using a standard blender, see chia seed note), add the banana, raspberries, almond butter, chia seeds, cardamom, salt, and 1 tbsp of the maple syrup. Puree on high speed for a minute or so until fully blended and smooth (do not blend too long as it will heat up the mixture). Taste, and add additional maple syrup if desired. Puree through again, then stir in coconut. Transfer to serving dishes and serve immediately, or refrigerate for a few hours before serving (see note).