Apple Baked Oatmeal
Apple Baked Oatmeal is an easy make ahead breakfast that is perfect for meal prep, brunches, or holiday breakfasts! Loaded with apples, cinnamon and walnuts, this recipe reheats great and is delicious! Not just for fall, this breakfast is great all year long!


Baked oatmeal is one of my favorite make ahead breakfasts as it is so simple, so delicious, and so easy to reheat! I love oatmeal and could eat it for breakfast every day, but I don’t always have the time to prepare it.
Baked Oatmeal with Apples and Cinnamon
This simple apple baked oatmeal only takes a few minutes to make, and lasts for days! It is a great breakfast to make ahead and enjoy for a few days, or it is great to serve at a brunch or holiday breakfast where you want something easy!
How to make this recipe
Homemade baked oatmeal is a really easy recipe to make! For the full directions, please scroll down to the recipe card below, but here is a general overview of how to make this.
- Preheat oven to 350 F.
- Grease a 9×9 baking pan and set aside.
- In a large bowl, mix together the oatmeal, brown sugar, ground flax seed, ground cinnamon, nutmeg, baking powder and salt.
- In a medium mixing bowl, whisk together the milk, eggs, and vanilla.
- Add the milk mixture and the melted butter to the oatmeal mixture and stir to combine. Allow to sit for a minute while you prepare the apples.
- Core and dice the apples. You can leave the skin on, or peel it – the choice is yours. Arrange the diced apple pieces in the bottom of the prepared baking dish.
- Top the apples with the chopped walnuts.
- Pour the oatmeal mixture over the apples and walnuts and spread evenly.
- Bake for 35-40 minutes, or until the oatmeal is set and firm, and starting to be golden brown on top.
- Allow to cool for a few minutes and then serve.
Frequently Asked Questions
Can I prepare this ahead of time?
Yes, you can! Follow the directions up to set 8. Once the oatmeal has been prepared, instead of placing the baking dish in the oven, cover it with a lid or foil and place in the fridge overnight. Allow the dish to sit on the counter to warm while the oven preheats, and then bake as direction.
How to store leftovers.
This oatmeal is so good as leftovers! In fact, I kind of prefer it as leftovers to freshly baked. Store leftovers with a lid in the fridge for up to 3-4 days.
Reheat the leftovers in the oven or microwave.
How to serve this oatmeal.
This oatmeal is great to eat as is straight from the pan. You can serve it with some maple syrup, or milk, or even a dollop of whipped cream if you feel fancy!
Kids in the kitchen: How your kids can help you cook
Involving your kids in the kitchen with you is important! Not only is it great for developing math and language skills, but it also helps them learn to be more independent and confident. And it helps them be more curious and open to trying new foods!
Apple baked oatmeal is a great recipe for kids to make because it helps them practice measuring both dry and wet ingredients, cracking eggs, stirring, and their knife skills!
- Kids aged 1-3 can help you measure all the ingredients and help stir.
- Kids aged 4-6 can do everything above plus help you whisk the wet ingredients together.
- Kids aged 7-10+ can help you do everything above, plus help you dice the apples.
*Please note that these recommendations are generalized, and to please use your personal discretion with your child’s skill level. And always, always supervise! Read more about how to have your children help you in the kitchen.
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Apple Baked Oatmeal Recipe
Equipment
Ingredients
- 3 cups old fashioned oats
- ½ cup brown sugar
- 1 Tablespoons ground flaxseed
- 2 teaspoons ground cinnamon
- 1 teaspoon baking powder
- ¾ teaspoon salt
- ¼ teaspoon ground nutmeg
- 2 ½ cups milk
- 2 eggs
- 2 teaspoons vanilla extract
- 4 Tablespoons unsalted butter melted and cooled slightly
- 2 apples cored and diced
- 1 cup chopped walnuts
Instructions
- Preheat oven to 350 F.
- Grease a 9×9 baking pan and set aside.
- In a large bowl, mix together the oatmeal, brown sugar, ground flax seed, ground cinnamon, ground nutmeg, baking powder and salt.
- In a medium mixing bowl, whisk together the milk, eggs, and vanilla.
- Add the milk mixture and the melted butter to the oatmeal mixture and stir to combine. Allow to sit for a minute while you prepare the apples.
- Core and dice the apples. You can leave the skin on, or peel it – the choice is yours. Arrange the diced apple pieces in the bottom of the prepared baking dish.
- Top the apples with the chopped walnuts.
- Pour the oatmeal mixture over the apples and walnuts and spread evenly.
- Bake for 35-40 minutes, or until the oatmeal is set and firm, and starting to be golden brown on top.
- Allow to cool for a few minutes and then serve.
Notes
This oatmeal is so good as leftovers! In fact, I kind of prefer it as leftovers to freshly baked. Store leftovers with a lid in the fridge for up to 3-4 days.
Reheat the leftovers in the oven or microwave. How to serve this oatmeal.
This oatmeal is great to eat as is straight from the pan. You can serve it with some maple syrup, or milk, or even a dollop of whipped cream if you feel fancy!
1. It’s only my husband and me so we had a lot leftover of the Apple Baked Oatmeal. Can leftovers be frozen?
2. The top was dry. Are there any suggestions so it turns out a little more moist?