This warm and cozy Apple Cinnamon Baked Oatmeal is made with old-fashioned oats, a touch of maple syrup for sweetness, and plenty of fresh apples. It’s the perfect as a filling breakfast or healthy afternoon snack.

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If you have never had baked oatmeal before, trust me…you are missing out!

Baked oatmeal is warm, cozy, so easy to make and the perfect breakfast casserole to meal prep on busy weeks. It’s typically made with old fashioned oats, eggs, and milk.

Watch How to Make This Recipe

If you are usually short on time in the morning, it’s a great option because it stores and reheats so well.

This hearty apple cinnamon baked oatmeal is full of fresh apples, cinnamon, maple syrup, and heart healthy whole grain oats.

More Delicious Baked Oatmeal Recipes

• Blueberry Baked Oatmeal
• Blackberry Baked Oatmeal
• Pumpkin Chocolate Chip Oatmeal Cups
• Banana Baked Oatmeal
• Pumpkin Baked Oatmeal
• Carrot Cake Baked Oatmeal 
• Strawberry Banana Baked Oatmeal 
• Triple Berry Baked Oatmeal Cups
• Banana Zucchini Baked Oatmeal Cups
• Peanut Butter Banana Baked Oatmeal Cups

The Ingredients You’ll Need to Make Baked Apple Cinnamon Oatmeal

Old fashioned oats: if you have a gluten sensitivity or allergy be sure to grab certified gluten free oats.

Eggs: these help bind everything together so you can get a delicious slice of baked oatmeal.

Almond milk: I love the neutral flavor of almond milk in this recipe but cashew, coconut, or oat milk would also work well.

Unsweetened applesauce: using unsweetened applesauce allows you to better control the sugar content in the baked oatmeal.

Maple syrup: for a little sweetness, this recipe uses maple syrup which works well with all of the other warm and cozy flavors in the oatmeal. You could also use honey if you prefer.

Melted butter: this adds a little extra richness and great flavor to the oatmeal.

Fresh apple: fresh diced apple chunks help to give this oatmeal even more texture and apple flavor.

Spices & Vanilla extract: warm spices and vanilla extract are a must in this baked oatmeal.

How to Make This Recipe

Step One: Start by preheating your oven to 350 degrees and spray a 9×13 baking dish with a little oil or non-stick baking spray.

Step Two: To a large mixing bowl, add the eggs, almond milk, apple sauce, maple syrup, melted butter, and vanilla extract. Whisk all of the wet ingredients together until well combined.

Step Three: Next, add the gluten free oats, baking powder, ground cinnamon, and salt to a separate mixing bowl and stir the dry ingredients until well combined.

Step Four: Next, fold the dry ingredients into the wet ingredients until you have a well mixed batter.

Step Five: Lastly, fold the diced apples into the batter until well combined.

Step Six: Transfer the baked oatmeal batter to a greased 9×13 baking dish. Bake the oatmeal at 350 degrees for 25-30 minutes until the oatmeal is just set.

Step Seven: Serve the baked oatmeal with a drizzle of icing if you like or almond butter and Greek yogurt.

Delicious Baked Oatmeal Mix-Ins

• chopped nuts – walnuts, pecans, or sliced almonds would all work really well in this recipe to give it even more texture and some crunch.
• fall spices – use a combination of your favorite warming spices instead of just cinnamon; you could use a teaspoon of apple pie spice or a blend of cardamom, ginger, and nutmeg.
• dried fruit – adding a handful of dried cranberries, raisins, or shredded coconut would all be delicious.

Frequently Asked Questions

Can I use a flax egg?

Yes! Several readers have reported that they have used flax eggs as a substitute in my baked oatmeal recipes with great results. You could also use you favorite egg replacement instead.

What can I substitute for butter?

Melted coconut oil or melted ghee will both work well as a substitute for melted butter in this recipe. If you’re feeling fancy you could swap the regular butter for brown butter instead.

Do I have to use dairy free milk?

No! Feel free to use regular whole milk if you prefer.

Can I use steel cut oats instead of old fashioned rolled oats?

No. For the best texture and results, I’d recommend using old fashioned whole grain oats or quick oats in this recipe, not steel cut oats.

How do I reduce the sweetness?

This baked oatmeal is pretty forgiving when it comes to the sweetness. I’ve actually made it without sweetener altogether at times and while it definitely is less sweet, the texture is not impacted at all.

If you would like to reduce the amount of sweetness in this baked oatmeal you can halve the amount of maple syrup or leave it out entirely.

Can I use another fruit instead of apples?

Sure! Feel free to use whatever fruit you like. I think pears would be a delicious substitute.

I don’t have applesauce, can I use something else?

If you like, you can use mashed banana but it will change the flavor of the recipe. I’d recommend making another one of my baked oatmeal recipes instead.

How to Serve Baked Oatmeal

There are so many delicious ways to serve this apple cinnamon baked oatmeal. Feel free to get creative with your toppings and other fun additions!

Here are a few of my favorites:

• drizzle on an easy glaze made with powdered sugar and almond milk
• add a dollop of Greek yogurt
• pour on a bit of maple syrup or honey
• sprinkle on extra cinnamon and fresh apple slices

Can I Meal Prep This Recipe In Advance?

Option One: Because the oats will soak up all of the liquid in the batter, I do not recommend prepping the batter in advance and baking the next morning. Instead, I find it more helpful to prep all of the dry ingredients and all of the wet ingredients separately the night before.

Option Two: The second option is my personal favorite which is to bake the oatmeal the night before and then reheat in the morning. 

How to Store and Reheat Leftover Baked Oatmeal

• Store the baked oatmeal in an air-tight container in the fridge for 4-5 days.
• Reheat the baked oatmeal in the microwave for thirty seconds at a time until warm or in the oven at 350 degrees, wrapped in foil, until warmed through.

Can You Freeze This Baked Oatmeal?

Yes! To freeze the oatmeal, let it come to a complete cool and then transfer to a freezer safe storage container. You can reheat the oatmeal in the oven at 350 degrees wrapped in foil until warmed through or in the microwave.

Reader Favorite Make Ahead Breakfast Recipes

Apple Cinnamon Waffles

Bacon, Egg, and Cheese Muffins

Sweet Potato and Sausage Frittata

Strawberry Overnight Oats

Banana Bread Chia Pudding

Banana Oatmeal Pancakes

I hope you give this Baked Apple Cinnamon Oatmeal a try! This makes a quick and easy breakfast or snack that everyone will love!

If you do give this recipe a try, I want to know! Leave a comment with a star rating below. You can also snap a photo & tag @allthehealthythings on INSTAGRAM. Your reviews help support All the Healthy Things and make it possible for me to continue to create the recipes you know and love.

Recipe by: Ashlea Carver / All the Healthy Things | Photography by: THE MINDFUL HAPA