Mix the dry base: In a jar or bowl, stir together the rolled oats, protein powder, chia seeds, cinnamon, and a pinch of salt until there are no clumps.
Add the liquids: Pour in the milk, Greek yogurt, vanilla, and almond extract. Add maple syrup or honey if using.
Stir well until everything is smooth and evenly combined.
Fold in blueberries: Gently mix in the blueberries. If using frozen, no need to thaw—just toss them in.
Chill: Cover and refrigerate for at least 4 hours, ideally overnight, so the oats and chia seeds can thicken.
Adjust in the morning: Give the oats a good stir. If they’re too thick, add a splash of milk.
Taste and add a little more sweetener if needed.
Finish with toppings: For muffin-like flair, add a sprinkle of crushed almonds and a little lemon zest before serving.