In a medium mixing bowl, whisk together the almond milk, protein powder, cocoa powder, maple syrup, vanilla extract, and salt until smooth.
Add the chia seeds to the mixture and whisk vigorously for 1-2 minutes to ensure even distribution and prevent clumping.
Let the mixture sit for 5-10 minutes, then whisk once more to break up any settling seeds.
Cover the bowl or transfer the mixture into individual jars and refrigerate for at least 2 hours, or overnight, until the pudding has thickened.
Serve chilled, optionally topped with fresh berries or nuts.