Add the strawberries, milk, Greek yogurt, and vanilla to a blender and blend until smooth.
Add the protein powder and blend just until combined.
Taste and add maple syrup as needed for sweetness.
Pour into a bowl or container and stir in the chia seeds.
Let sit for about 10 minutes, then stir again to help prevent clumping.
Divide between 4–6 containers and refrigerate.
It will continue to thicken as it chills.
