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    Home » Recipes

    Oatmeal Breakfast Casserole

    Published: June 2, 2025 / By: Gloria Duggan | Homemade & Yummy 146 Comments

    This post may contain affiliate links. As an Amazon Associate I earn from qualifying purchases. Disclosure Policy.
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    Oatmeal Breakfast Casserole is a warm and delicious way to start your day.

    An easy baked oatmeal recipe packed with lots of healthy ingredients. It’s like a warm and cozy sweater for your taste buds.

    Baked oatmeal breakfast casserole with blueberries.

    Simple oatmeal breakfast bake that is wholesome and delicious. The perfect make-ahead breakfast for busy mornings. Great for brunch too.

    Breakfast is the most important meal of the day. We have all heard this for years. You can likely remember your grandmother saying it to you, I know I do.

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    I love oatmeal recipes in the morning. This versatile ingredient can be used in so many creative ways. Have you tried baked chocolate strawberry oatmeal? It’s like having dessert for breakfast.

    Baked breakfast casserole in the baking dish ready to go into the oven.

    I have lots of great oatmeal breakfast ideas for you to try. Here are a few of our favourties:

    • Baked breakfast donuts are a hit with the grandkids. They always ask for them on sleepover weekends. Yes, you can eat donuts for breakfast.
    • Oatmeal pancakes are hearty and nutritious, protein-rich and so satisfying.
    • Homemade muesli cereal is so much better than store-bought. You can easily customize it just the way you like.

    If you are into overnight oatmeal, this chocolate oatmeal recipe is sure to be a hit. After all, who doesn’t want to eat chocolate in the morning?

    Speaking of overnight oatmeal recipes, this blueberry and banana oats recipe is a delicious and healthy way to start the day.

    Blueberry oatmeal casserole in the baking dish right out of the oven.

    Healthy Baked Oatmeal Ingredients

    • Old fashioned oatmeal, regular oats work well too.
    • Blueberries, either fresh or frozen.
    • Almonds, I like sliced but slivered are fine.
    • Milk, both regular and non-diary work in this recipe.
    • Maple sugar, however brown sugar or coconut sugar are great alternatives.

    You can easily swap out ingredients in this breakfast casserole. Check out the suggestions and recipe tips below.

    Baked Oatmeal Breakfast Casserole with almonds in white bowl.

    Baked Oatmeal Breakfast Casserole

    It’s as easy as 1-2-3! Full instructions are in the recipe card.

    1. Preheat the oven, and spray a baking dish.
    2. Mix all the ingredients in a large bowl.
    3. Pour into the prepared pan and bake.

    Honestly, even the kids can do this. Once baked, place in serving bowls, garnish with additional berries and milk and dig in. Store leftovers in a sealed container in the fridge.

    Suggestions / Recipe Tips

    • Dairy and non-diary milk can be used. My new favourite non-dairy milk is oat milk. Almond milk, soy or coconut would be great too.
    • Almonds can be swapped out for pecans, walnuts, pistachios, or whatever your favourite nut is.
    • Maple sugar is so delicious, but feel free to use brown sugar, coconut sugar or even maple syrup or honey.
    • Old-fashioned oats are great for any baking recipe. Regular oats are fine. Steel-cut oats will not work well in this casserole.
    • Blueberries can be fresh or frozen. You can also use apples, pears, or any other berry you like.
    Milk getting poured onto oatmeal.
    Is baked oatmeal healthy?

    Yes, baked oats are nutritious and filling. This recipe is like eating a healthy cake for breakfast.

    Can baked oats be reheated?

    This is the perfect breakfast recipe for reheating. I like to make lots so we can reheat on busy weekdays. Just pop a bowl in the microwave for a minute or so. Breakfast is ready.

    A spoon in a bowl of blueberries and oatmeal.

    Incorporating oatmeal into recipes is so easy. Give these a try:

    • No-Bake Granola Bars are perfect for lunch boxes, snacking, or eating on the run.
    • Granola Dust is a great topping for yogurt.
    • Chewy Granola Bars are soft and filled with lots of nutritious ingredients.
    • Trail Mix Bites are fun to make. These are grandkid approved.

    Of course, we cannot resist chewy oatmeal cookies, or apple muffins with oatmeal.

    Oatmeal breakfast bake.Pin
    Baked oatmeal breakfast casserole with blueberries.

    Baked Oatmeal Breakfast Casserole

    Baked Oatmeal Casserole with almonds and blueberries is a delicious way to start the day.
    5 from 53 votes
    Pin Recipe Print Rate Save To Your Recipe Box Saved!
    Course: Breakfast
    Cuisine: Canadian
    Prep Time: 10 minutes minutes
    Cook Time: 35 minutes minutes
    Total Time: 45 minutes minutes
    Servings: 6 people
    Calories: 410kcal
    Author: Gloria Duggan | Homemade & Yummy

    Ingredients

    • 2 cups old fashioned rolled oats
    • 1 cup sliced almonds
    • 1 ½ cups blueberries (fresh or frozen) (if using frozen, partially thaw)
    • 2 cups milk (regular or non dairy)
    • ½ cup maple sugar
    • additional berries (for garnish)

    For topping:

    • ¼ cup sliced almonds
    • ¼ cup maple sugar
    US Customary – Metric

    Instructions

    • Preheat oven to 350º F.
    • Spray and 8×8 inch baking dish with cooking spray.
    • In a large bowl, combine all ingredients (except toppings) and mix well.
    • Pour into prepared baking dish.
    • Sprinkle on the toppings.
    • Bake for 35-40 minutes.
    • Remove from oven and let rest for 10 minutes.
    • Cut into squares. Place into serving bowl.
    • Serve with additional milk and fresh berries.

    Nutrition Information

    Calories: 410kcal | Carbohydrates: 54g | Protein: 12g | Fat: 18g | Saturated Fat: 3g | Polyunsaturated Fat: 4g | Monounsaturated Fat: 10g | Trans Fat: 1g | Cholesterol: 8mg | Sodium: 45mg | Potassium: 458mg | Fiber: 5g | Sugar: 31g | Vitamin A: 134IU | Calcium: 194mg | Iron: 3mg

    Notes

    You can easily replace the oats with gluten free oats, and the milk with non dairy options. Sweeten with maple syrup or honey instead of the maple sugar. 
    This is perfect made on the weekend for brunch. Leftovers are great for easy, healthy breakfast throughout the week.
    Frozen berries can be used in place of fresh berries. 
    Tried this recipe?Take a picture and tag @homemadeandyummy
    Nutritional information on this site is generated via a plugin. I am not responsible for the accuracy of the plugin information.

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    MEET THE AUTHOR

    Gloria Duggan is the author for Homemade & Yummy, where she creates fun and easy recipes. She is also a brand ambassador/influencer for well-known companies. Gloria has judged food competitions and has posted about local food events. Gloria's work has been featured in magazines, and she has been interviewed on several podcasts. Read More…

    Reader Interactions

    Comments

    1. Julie Wunder

      October 22, 2021 at 2:14 pm

      What a cozy breakfast idea. This came out perfect and my entire family loved the blueberry flavors. This one is a keeper for sure!

      Reply
      • Gloria Duggan | Homemade & Yummy

        October 25, 2021 at 9:16 am

        So glad your family enjoyed this blueberry baked oatmeal for breakfast.

    2. Dana

      October 22, 2021 at 9:06 am

      This is a fantastic breakfast and so easy to make.

      Reply
      • Gloria Duggan | Homemade & Yummy

        October 25, 2021 at 9:17 am

        I agree, this is like eating dessert for breakfast.

    3. Natalie

      October 22, 2021 at 8:07 am

      Having oats for breakfast is so healthy, that’s why oats are my favorite choice in the morning. I will give your baked oatmeal recipe a try. Looks fantastic!

      Reply
      • Gloria Duggan | Homemade & Yummy

        October 22, 2021 at 8:27 am

        This baked oatmeal recipe is like eating cake for breakfast!!

    4. Claudia Lamascolo

      October 22, 2021 at 4:12 am

      After reading the ingredients I can tell this is over the top tasty for breakfast. I love the addition of maple sugar and sure hope I can find it. I love that flavor, great ingredients and recipe thanks cant wait to dig into it!

      Reply
      • Gloria Duggan | Homemade & Yummy

        October 22, 2021 at 8:28 am

        This is like having dessert for breakfast. Hope you give it a try soon.

    5. Toni

      October 21, 2021 at 10:34 am

      This is such an amazing day starter! My kids enjoyed it!

      Reply
      • Gloria Duggan | Homemade & Yummy

        October 22, 2021 at 8:28 am

        It’s hard not to love this baked blueberry oatmeal.

    6. Kristen

      October 21, 2021 at 10:12 am

      I made this for breakfast yesterday and it was great. My daughter loved it! Thank you for the recipe!

      Reply
      • Gloria Duggan | Homemade & Yummy

        October 22, 2021 at 8:28 am

        You are welcome. It’s like eating dessert in the morning.

    7. Sarah James

      October 21, 2021 at 9:54 am

      What a great idea, I love oats for breakfast. I like how you can reheat it too, thanks for sharing.

      Reply
      • Gloria Duggan | Homemade & Yummy

        October 22, 2021 at 8:28 am

        Yes, reheating is easy and delicious.

    8. Beth

      October 21, 2021 at 9:26 am

      Easy, healthy, and delicious. My kids and I loved it. Thanks for the great recipe.

      Reply
      • Gloria Duggan | Homemade & Yummy

        October 22, 2021 at 8:29 am

        You are welcome. This baked oatmeal is a favourite here too.

    9. Tavo

      October 21, 2021 at 9:26 am

      This is my kind of breakfast! Blueberries and oatmeal! Can’t ask for more! Very nutritious and tasty!

      Reply
      • Gloria Duggan | Homemade & Yummy

        October 22, 2021 at 8:29 am

        Nutritious, delicious, and easy to make. A winner all around. ENJOY!

    10. Liz

      October 20, 2021 at 11:24 pm

      this sounds so yummy and healthy, I’m excited to make it!

      Reply
      • Gloria Duggan | Homemade & Yummy

        October 21, 2021 at 8:51 am

        Hope you give this baked oatmeal casserole a try soon.

    11. Jeri

      October 20, 2021 at 5:49 pm

      This oatmeal breakfast casserole with blueberries is perfect for these cooler mornings. I am always the first one up in my household, and everyone woke up to the smell of this delicious casserole cooking in the oven. I can’t wait to make this recipe again! It was so good!

      Reply
      • Gloria Duggan | Homemade & Yummy

        October 21, 2021 at 8:52 am

        So glad your family loved this blueberry baked oatmeal. It is a hit in our house too.

    12. Lilly

      October 20, 2021 at 3:07 pm

      These baked oats are so delicious! I made them for meal prep this week so I wouldn’t have to think about what to have for breakfast! It’s been nice having this ready in the morning.

      Reply
      • Gloria Duggan | Homemade & Yummy

        October 20, 2021 at 3:46 pm

        I totally agree. Having breakfast ready is a game changer in the mornings. This baked oatmeal casserole is so good.

    13. Kay

      October 20, 2021 at 2:21 pm

      What a great breakfast recipe 🙂
      This recipe has a great crunch from the oats and the sweet taste of blueberries, lush

      Reply
      • Gloria Duggan | Homemade & Yummy

        October 20, 2021 at 3:47 pm

        I love all the textures in these baked oats too. ENJOY!

    14. Karla

      October 20, 2021 at 2:06 pm

      This is a great recipe for the upcoming holidays! Thank you

      Reply
      • Gloria Duggan | Homemade & Yummy

        October 20, 2021 at 3:47 pm

        You are welcome. You can never go wrong with baked oatmeal for breakfast.

    15. Glenda

      October 20, 2021 at 10:31 am

      A warm hug on these cool Fall mornings! I love the crunch from the almonds and the pops of sweet freshness from the blueberries!

      Reply
      • Gloria Duggan | Homemade & Yummy

        October 20, 2021 at 3:48 pm

        Yes this breakfast casserole is like a warm hug in the morning.

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