Pour the rolled oats into a clean jar or container with a lid.
Add the milk of your choice to the jar, pouring slowly over the oats to ensure they are fully submerged.
Stir in the vanilla extract thoroughly, mixing until all the oats are evenly coated and the mixture looks creamy and slightly glossy.
Seal the jar tightly and give it a gentle shake to combine everything evenly.
Place the jar in the refrigerator and let it soak overnight, or for at least 4 hours, until the oats are soft and have absorbed the milk.
Once ready to serve, open the jar and give the oats a gentle stir—this helps them relax into a thick, creamy consistency.
Spoon the soaked oats into bowls or leave in the jar and top with fresh berries for added color and flavor.
Garnish with extra berries or a drizzle of honey if desired, then enjoy with a spoon for a cool, creamy breakfast.