Creating Baked Apple Cinnamon Overnight Oatmeal is straightforward if you follow these steps:

1. Preheat your oven to 350°F (175°C).
2. Prepare the baking dish: Grease a 9×9-inch baking dish or a similar size with cooking spray or a bit of oil.
3. Combine the dry ingredients: In a large mixing bowl, combine oats, baking powder, cinnamon, and salt. Stir to mix evenly.
4. Add the wet ingredients: Pour in the almond milk, maple syrup, and vanilla extract. Mix until combined.
5. Fold the apples: Add the diced apples to the mixture. If using, fold in nuts and dried fruits as well.
6. Transfer to the baking dish: Pour the oatmeal mixture into the prepared baking dish, spreading it evenly.
7. Bake: Place in the oven and bake for 25 minutes or until the oats are set and the top is slightly golden.
8. Cool before serving: Let it cool for a few minutes before cutting into portions.
9. Store leftovers: If there are leftovers, store them in an airtight container in the fridge for up to five days.

With these easy steps, you’ll create a wholesome and hearty dish that reminds you of cozy mornings.