Baked Apple Cinnamon Oatmeal

Baked Apple Cinnamon Oatmeal with tender pieces of apple, plenty of cinnamon flavor, and chewy baked oatmeal makes the best hearty breakfast and snack.


Baked Apple Oatmeal is the perfect warm and hearty breakfast and can be made in advance for meal prep. We are huge fans of baked oatmeal recipes and this is one of our favorites along with this Baked Blueberry Banana Oatmeal and Strawberry Banana Oatmeal.

Last week I wanted anything but fall comfort food after over-indulging on Thanksgiving but this weekend I woke up craving it. All I wanted was a big bowl of apple crisp but unfortunately, we had already gone through three batches of this Cinnamon Cranberry Apple Crisp during Thanksgiving week so it was time to switch it up. Baked oatmeal is one of my favorite dishes for lazy weekend mornings, so I decided to make an apple crisp inspired baked oatmeal full of cinnamon, baked apples, and brown sugar.

To make sure the apples got soft and delicious, they are baked them first with cinnamon and brown sugar. You could add some melted butter as well if you want a richer flavor. Then the oats are added along with milk and an egg to help everything come together. The result is a mix between oatmeal and a breakfast bar. Full of apple cinnamon flavor and hearty and filling so that you aren't hungry two hours after breakfast. One quick note on the recipe, I try not to use too much sugar in the recipe since the apple brings a lot of sweetness on its own, but you may want to add a bit more sugar, honey, or maple syrup if you have a sweet tooth.

Baked oatmeal with apples and cinnamon in a glass baking dish.

How do you make baked oatmeal?

To make a basic baked oatmeal recipe, you will want start by combining equal parts oats, liquid, and fruit and add 1 egg for every cup of oats that you use. Additionally, you will want to add around 1/4 cup sweetener for every cup of oatmeal. And you can add spices, nuts, coconut, chocolate chips, or any other ingredients you like. Then bake everything at 350 degrees for 30-40 minutes. This works for an individual serving (although they may cook quicker) or a huge pan of oatmeal for a crowd. Here's the basic recipe for 4 people:

Basic Baked Oatmeal Recipe

  • 1 cup oatmeal
  • 1 cup unsweetened almond milk (or other milk)
  • 1 cup fruit (berries, bananas, apples, plums, etc)
  • 1/4 cup sweetener (honey, maple syrup, brown sugar, mashed banana, etc)
  • 1 egg
  • Bake at 350 degrees for 30-40 minutes. Serve it hot or cold. If you let it cool, store it in the refrigerator.

Can you freeze baked oatmeal?

There are a few different ways to freeze baked oatmeal depending on how you plan to serve it. 

  • Freezing before baking: If you are making this for a big breakfast, brunch, or party - I would recommend making the oatmeal but not baking it. Freeze it right in a large glass baking dish. The night before you plan to serve it, take it out and let it defrost overnight in the fridge. Then bake it at 350 degrees for around 45 minutes or until it is warmed and set.
  • Baking then freezing: If you make a large batch of this and find you need to freeze the leftovers, you can do that as well. Pack in a freezer safe container and then defrost in the microwave or in the oven until warmed through. If you remember, place it in the fridge the night before to defrost. It retains more moisture that when defrosted in that manner.
  • Freezing individual portions: If you want to make individual servings for grab and go breakfasts, bake the oatmeal in individual servings using a muffin tin. Simply fill a muffin tin with the oatmeal mixture. Then bake for 15-18 minutes. Once they are cooled, freeze the individual portions. Reheat in the microwave or toaster oven.

Baked oatmeal with apples and cinnamon in a glass baking dish.

Should baked oatmeal be refrigerated?

If you aren't going to finish the oatmeal the morning it is prepared, it is best to refrigerate so that it stays fresh. It will stay good in the fridge for 3-5 days. Baked oatmeal can be eaten cold or warmed in the microwave, oven, or toaster oven. If the oatmeal seems dry at all, add some milk to add some moisture. You can also top with yogurt to add moisture.

Can I make baked oatmeal with instant oats?

Although you can make baked oatmeal with instant oats, I wouldn't recommend it. Instant oats cook differently than traditional rolled oats and tend to get mushy when baked. To maintain the texture of the oats, only make baked oatmeal with rolled oats.

Looking for more healthy baked oatmeal dishes?

The Recipe
Baked Apple Cinnamon Oatmeal

Baked Apple Cinnamon Oatmeal

TOTAL TIME: 1 Hours, 5 Min
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  • 1 lb apples, chopped into small pieces
  • 1 tsp cinnamon, divided
  • 3 tbsp brown sugar, divided (or honey/maple syrup)
  • 1 1/3 cups rolled oats
  • 1/4 tsp salt
  • 1 egg
  • 1 1/2 cups nonfat milk (or unsweetened almond milk)
  • 1 tsp vanilla extract

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Preheat the oven to 350 degrees.


Add the apples to a glass baking dish and toss with half the cinnamon and brown sugar. Cover with foil. Bake for 20 minutes.


Meanwhile, mix together the oats, remaining brown sugar and cinnamon, and salt. Mix together the egg, milk, and vanilla extract in a separate bowl.


Remove the apples from the oven and mix in the oat mixture. Then pour milk and egg mixture over top and give it one quick stir.


Bake for 30 minutes.

Nutritional Facts
Serving Size: 1-1.25 cups
Amount Per Serving
Calories 269
Calories from Fat 30
% Daily Value *
Total Fat 4g
Saturated Fat 1g
Monounsaturated Fat 0g
Polyunsaturated Fat 0g
Cholesterol 48mg
Sodium 220mg
Total Carbohydrate 53g
Dietary Fiber 6g
Sugars 30g
Protein 9g

* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Nutritional Values provided are estimates only and may vary based on the preparation method.

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About the authorMeet Kristen McCaffrey
Hi, I’m the cookbook author, recipe developer, and food enthusiast behind Slender Kitchen. I am obsessed with making healthy food that is easy to prepare and absolutely delicious. Meal planning is my secret weapon and I hope I can make meal time easier for you with our tried and tested recipes and foolproof meal plans. Learn More
On Baked Apple Cinnamon Oatmeal
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June 11, 2022 - 12:50
Should I change this to 12 servings if I want to use a muffin tin for individual portions?
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Bernadette Ferguson
January 7, 2022 - 09:22
WOW! Nearly 500 calories per serving without the nuts. Thanks but no thanks.
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January 7, 2022 - 09:42
There are actually only 269 calories per serving.
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Heather Griffin
January 6, 2019 - 16:43
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This was delicious! I can't wait to make it again. My entire family loved it!
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Cassandra Lipnicki
February 27, 2017 - 06:24
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Really enjoyed this! Though was confused by ingredients-supposed to put brown sugar and cinnamon on apples and in oats but I only saw those ingredients listed once in the list? I guessed for mine and it came out good. Kid and husband liked it.
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Lynn Hachenberg
February 19, 2017 - 02:25
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Kristen, are the brown sugar and cinnamon meant to be divided? Recipe instructions say to add both to the apples and bake for 20 minutes. In the next step, recipe says to mix oats, brown sugar cinnamon and salt. For now, I've divided the ingredients. I had steel cut oats' so I'm soaking them with the egg, vanilla milk mixture while the apples are baking.
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