In a blender, combine plant-based milk, chia seeds, cocoa powder, maple syrup, and vanilla extract. Blend on high until smooth and well combined, about 10–15 seconds.
Pour the mixture evenly into 4 jars or small bowls.
Cover and refrigerate for at least 3 hours—or overnight—for the chia to thicken into a pudding texture.
Top with yogurt, shaved chocolate, and raspberries if desired. Enjoy chilled.
