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Healthy Blueberry Baked Oatmeal {Gluten Free, No Refined Sugar}

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Start your day off right with this easy, healthy Blueberry Baked Oatmeal recipe. This make-ahead breakfast casserole is perfect for a grab and go meal or a lovely addition to brunch.

I did not grow up as a breakfast food lover. In fact, I’m known to eat the previous night’s dinner for breakfast.

But that all changed when I fell in love with baked oatmeal. Filling you up without the need for a mid-morning nap, this recipe has enough protein to keep you going until lunch time!

Blueberry Baked Oatmeal

Why I love Blueberry Baked Oatmeal:

  • Baked oatmeal recipe can be made ahead of time and reheated (or eaten chilled). You can wrap individual pieces and freeze for later, too!
  • It’s portable (hello, busy farm families!)
  • With no refined sugar, it’s not overly sweet and better for you.
  • This recipe is awesome for a family or can feed a crowd (or extra hungry teenagers) when doubled
Blueberry Baked Oatmeal

Ingredients in Blueberry Baked Oatmeal

old fashioned or rolled oats: wholesome oats are the main ingredient because it’s baked oatmeal! Either of these oats work great. You won’t want to use quick oats or steel cut oats for this recipe. Use certified gluten free oats to make this a gluten free recipe.

baking soda: acts as a leavening agent, making your baked oatmeal lighter and fluffier.

cinnamon & vanilla: delicious flavor additions!

sea salt: Just a pinch works great in this recipe

eggs: act as the binder, plus they add a little protein.

maple syrup: nature’s sweetness! If you don’t have maple syrup, honey or agave nectar work.

milk: I use whole milk but you can use whatever you kind you have in your fridge. 2%, almond….I would think skim milk works too but I haven’t tried it myself.

blueberries: fresh, juicy berries if you have them. This recipe really brings out their inherent sweetness. If blueberries aren’t in season, you can substitute frozen berries. Just don’t thaw them, pop them in right from the freezer!

How to Make Blueberry Baked Oatmeal

Blueberry Baked Oatmeal unbaked

In under ten minutes, you’ll be on your way to a healthy breakfast you’ll feel good about feeding yourself and your family!

  1. Preheat your oven to 350°F. In a medium sized bowl, combine dry ingredients (oats, baking soda, cinnamon, and sea salt). Mix.
  2. In another bowl, combine 2 eggs, lightly beaten, maple syrup, vanilla extract and milk. I used whole milk but you can use whatever you have on hand. Whisk together and add to your dry ingredients.
  3. Add the wet ingredients to the dry ingredients and mix using a spoon or spatula. Fold the blueberries into the batter taking care to be gentle (don’t go crazy here, now is not the time to get your aggression out!) If you overwork the blueberries, you’ll end up with a less appetizing oatmeal bake.
  4. Grease a 9×9 baking pan. Pour in the oatmeal mixture and spread evenly. Bake for 35-40 minutes until the center is set. Allow to cool for 15-20 minutes before slicing and serving.

While it’s baking it makes the kitchen smell SO GOOD. It’s a homey, delicious scent that is edible, unlike all the candles in my household.

When my blueberry oatmeal was done baking, I took the pan out of the oven and sniffed it. Twice.

That, my friends is the sign of a good breakfast.

Can I use frozen berries?

Yes, you can use frozen blueberries! Add them to the recipe right before baking. Keep them frozen so you don’t have a grey-purple oatmeal.

Can this recipe be doubled?

Again, the answer is yes! Bake in a 9 x 9 dish or if doubling, a 9 x 13 pan. You could also make these this blueberry oatmeal as muffins!

Leftovers can be wrapped in plastic wrap and frozen for several months.

Can I use different oats?

I recommend old fashioned oats for their texture and density. You could use quick oats if needed. I do not recommend using steel cut oats as they’re a different type of oat altogether.

How to Make this Ahead:

Do you have too much time on your hands? Yeah, me either. Here are a few ways you can get ahead by making this baked oatmeal as part of your meal prep!

  • Bake this ahead of time and freeze slices, individually wrapped
  • Bake ahead of time and refrigerate
  • Assemble as instructed up until the blueberries are added and refrigerate overnight. Just before baking, add the blueberries and pour into your prepared pan.

To reheat, microwave slices on a plate for about 30 seconds. If frozen, I recommend thawing in the refrigerator overnight and then reheating.

More Blueberry Recipes

More Baked Oatmeal Recipes

I hope you enjoy this delicious baked blueberry oatmeal! If you make it, comment or leave a review below. I’d love to hear from you!

Yield: 9 squares

Healthy Blueberry Baked Oatmeal

Blueberry Baked Oatmeal

Start your day off right with this easy, healthy Blueberry Baked Oatmeal recipe. This make-ahead breakfast casserole is perfect for a grab and go meal, or a lovely addition to brunch.

Prep Time 5 minutes
Cook Time 40 minutes
Total Time 45 minutes

Ingredients

  • 3 cups old fashioned rolled oats
  • 2 teaspoon baking soda
  • 1 teaspoon cinnamon
  • ⅛ teaspoon sea salt
  • 2 eggs, lightly beaten
  • ½ cup pure maple syrup
  • 1 tsp vanilla extract
  • 1.5 cups milk
  • 1 pint blueberries

Instructions

  1. Preheat oven to 350°F. In a medium sized bowl, whisk your dry ingredients together (oats, baking soda, cinnamon, and sea salt). Mix.
  2. In another bowl, combine 2 eggs, lightly beaten, maple syrup, vanilla extract and milk. I used whole milk but you can use whatever you have on hand. Whisk together and add to your dry ingredients.
  3. Pour the wet ingredients over the dry ingredients and mix using a spoon or spatula. Fold the blueberries into the batter taking care to be gentle (no blueberry smushing here, we want these intact!).
  4. Grease a 9x9 baking pan. Pour in the oatmeal mixture into your prepared baking dish and spread evenly.
  5. Bake for 35-40 minutes until the center is set. Allow to cool for 15-20 minutes before slicing and serving.

Notes


Serve as is or with a drizzle of maple syrup or dollop of plain Greek yogurt.

To make overnight blueberry baked oatmeal or make ahead of time:

  • Bake this ahead of time and freeze slices, individually wrapped
    • Bake ahead of time and refrigerate
    • Assemble as instructed up until the blueberries are added and refrigerate overnight. Just before baking, add the blueberries and pour into your prepared pan.

    Substitution ideas

    Frozen blueberries or frozen mixed berries may be substituted for fresh.

    Brown sugar can be substituted for the maple syrup.

    For the milk, you can also use unsweetened vanilla almond milk or vanilla almond milk.

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    Nutrition Information:

    Yield:

    9

    Serving Size:

    1

    Amount Per Serving: Calories: 299Total Fat: 2gSaturated Fat: 1gTrans Fat: 0gUnsaturated Fat: 1gCholesterol: 45mgSodium: 351mgCarbohydrates: 29gFiber: 2gSugar: 21gProtein: 4g

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    Karen

    Tuesday 13th of July 2021

    Can you substitute almond milk?

    Deanne Frieders

    Wednesday 14th of July 2021

    Yes, that works great!

    Pamela Thompson

    Wednesday 13th of January 2021

    What are reheating instructions? From refrigerated and from frozen please.

    Deanne Frieders

    Wednesday 13th of January 2021

    Hi Pamela! To reheat from refrigerated, I like to microwave for 30 seconds or so. I recommend thawing in the fridge overnight and then reheating.

    Jackie

    Wednesday 13th of January 2021

    Have you ever tried making muffins instead of in a pan? I have a muffin tin that makes squares and I would like to try it! Also, have you ever substituted light agave for the maple syrup? Just for myself, I use that instead. Trying to cut calories and "points." Thank you! Can't wait to try this recipe!

    Deanne Frieders

    Wednesday 20th of January 2021

    Yes, you could make it into muffins. You may want to reduce the quantity of agave since it's slightly sweeter. Would love to hear how it turned out!

    Deanne Frieders

    Wednesday 13th of January 2021

    Hi Jackie, I'm sure you can make this as muffins instead of a pan. Baking time will be less for sure.

    Also, you could sub light agave or honey or the maple syrup. I'll add that to the recipe, it's a great thing to point out!!! Thanks for stopping by :)

    Dannii

    Saturday 9th of January 2021

    We love making baked oats and blueberry is always our favourite.

    Jesse

    Saturday 9th of January 2021

    My family enjoyed this Blueberry Baked Oatmeal and my mother in law appreciated the fact it’s gluten-free.

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