Whisk milk, yogurt, cacao, protein powder, maple syrup, vanilla, and salt until smooth
Stir in chia seeds
Stir once after 20-30 minutes so the chia seeds distribute evenly
Let set in the fridge for at least 6 hours or overnight
If after chilling it's thicker than you want, stir in 1-2 tablespoons milk
Serve with vanilla quark for extra protein and berries
