Mix It Up: In a medium bowl or jar, whisk together the milk, chia seeds, maple syrup, and vanilla. Give it a good stir so the seeds don’t clump.
Add Berries: Gently fold in the berries. If using frozen, no need to thaw—just toss them in.
Chill: Cover and pop the mixture in the fridge for at least 2 hours (overnight is even better). Stir once after 30 minutes to prevent lumps.
Serve: Spoon into bowls or jars, top with extra berries, and dig in!