Put all the ingredients except the whole and ground chia seeds and the shredded coconut in a blender and blend until smooth. Taste and add more stevia if desired.
Pour the mixture into a large glass mason jar, add the whole chia seeds, cover, and shake well to combine. Refrigerate for 8 hours or overnight to allow the chia seeds to gel.
After it sets, whisk the mixture vigorously to break up the gelled seeds so that they’re evenly distributed and the mixture is smooth and thick.
Add the ground chia seeds (if using), cover, and shake to combine. If you prefer a thinner consistency, you can omit the ground chia seeds. Place in the refrigerator to set for up to 1 hour, until thickened a bit more.