In a bowl or jar, whisk together milk, cocoa powder, sweetener, vanilla, and salt until smooth and well combined.

Stir in chia seeds, ensuring they are evenly distributed and not clumped.

Cover and refrigerate for at least 4 hours or overnight to allow mixture to thicken to a pudding-like texture.

After chilling, stir thoroughly. If too thick, add a splash of milk to reach desired consistency.

Serve chilled, optionally topped with fresh berries, sliced banana, nut butter, or chopped nuts.