If using gelatin, evenly sprinkle a layer of gelatin over 2 tablespoons of cold milk in a small bowl and let it sit for 2 to 3 minutes. If you're using collagen peptides, skip this step and just add them directly in the next step.
In a medium bowl or large measuring cup, whisk together the coconut milk, remaining milk, cacao powder, honey, vanilla, salt, and cinnamon until smooth and fully combined. If you bloomed gelatin, whisk it in now.
Stir in the chia seeds and mix well to distribute them evenly. Don't skip this step or they'll clump at the bottom.
Let the mixture sit for 10 minutes, then give it one more good stir to break up any clumps that have formed.
Pour into individual jars or cover the bowl and refrigerate for at least 4 hours, or overnight, until thick and pudding-like.
Give each jar a stir before eating.
Notes
Top with fresh berries, a drizzle of raw honey, shredded coconut, or cacao nibs if desired.
Store this pudding in the fridge and eat within 3-5 days.