Blueberry Oatmeal Bars are a nutritious and delicious recipe the whole family will devour. You need one bowl and one pan for these easy & healthy oatmeal bars bursting with fresh blueberries! They are finished with an amazing oatmeal crumble topping!
Do you struggle with finding healthy breakfast or snack choices for your family? Something that doesn't come from a package and contains questionable ingredients?
My family is a little obsessed with healthy Easy Oatmeal Bars! This time of year, when berries are in season, this Strawberry Oatmeal Bar Recipe and these Easy Blueberry Oatmeal Bars 🫐 are made weekly!
Not only are they simple to bake, but they contain a minimal amount of processed sugar, so they are a Healthy Food Recipe the whole family loves.
If you are a fan of healthy bar recipes, you need to try Strawberry Oatmeal Bars and Banana Oatmeal Bars!
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Healthy Blueberry Oatmeal Bars
We should note that these bars are not overly sweet, with minimal sugar and whole grains. However, they are still incredibly delicious with the crumbly topping and baked blueberries!
One of the reasons we like them so much is oats! Oats are among the healthiest grains on earth. They're a gluten-free whole grain and a great source of essential vitamins, minerals, fiber, and antioxidants.
We're always looking for healthy snacks for the kiddos, so you can't go wrong when you bake oats into a bar, and it tastes this good!
We recently fell in love with these Oatmeal Banana Bars! Oh, so delish!
If you need them, we have tons of Baking Tips for beginners!
Step By Step Instructions
This recipe comes together with one bowl and one pan with a few simple steps!
Step 1 - Prepare Crust and Topping
First, preheat the oven to 350 degrees F. and line your pan with parchment. Next, combine all the dry ingredients for the main recipe, including rolled oats, ½ cup honey, melted butter, and vanilla extract, in a large bowl and mix.
Now, reserve 1 cup of the oat mixture, place the rest in the prepared pan, and pat down.
Tip: You can also add a little lemon zest to the recipe for added lemon flavor.
Step 2 - Prepare Blueberry Filling
Next, place the washed blueberries, lemon juice, cornstarch, and coconut sugar (if you prefer, use regular granulated sugar) in the bowl you used for the oat mixture.
Stir to combine.
Step 3 - Layer Ingredients in Pan & Bake
Next, place the blueberries on top of the oat mixture in the pan. Crumble the reserved cup of the oat mixture over the blueberries and place it in the oven for 45 minutes.
Tip: Since oven temperatures vary, check your oatmeal bars during the last few minutes of cooking to make sure they don't overcook.
Finally, let it cool completely before taking it out of the pan.
Get ready for your house to smell amazing!
Can You Use Frozen Blueberries?
A great question that's often asked, especially when blueberries are not in season. Yes, you can use frozen blueberries in this oat bar recipe.
When frozen, berries contain more water, so we recommend adding a teaspoon of cornstarch to the berries before adding the topping.
Vegan Blueberry Bars
Make the bars as instructed with these ingredients. They turn out great! If you'd like to make a vegan version of this bar, follow these substitutions:
- Substitute coconut oil for the butter.
- Use maple syrup instead of honey.
More Blueberry Recipes
Blueberry Crisp
Blueberry Tart
Blueberry Cobbler
Crockpot Blueberry Oatmeal
Blueberry Smoothie
Tips & Tricks
- Oats: This breakfast oat bar recipe is best if you use old-fashioned oats, not instant oats.
- Flour: We like using the healthy option of whole wheat flour, but regular flour would also work.
- Sweetener: Readers often use maple syrup instead of honey, with excellent results.
How To Store
- To store, layer the bars between waxed paper in an airtight container. Keep in the refrigerator for up to 5 days. Bring back to room temperature before serving.
You can definitely do these Baked Oatmeal Bars for Breakfast. They are a quick grab-n-go recipe that's healthy and a dream if you're rushing out of the house (like we do most of the time)! Munch away!
Recipe FAQs
This recipe is perfect for meal prep since you can freeze blueberry Oatmeal Bars for up to 3 months. Just bring them out of the freezer the day before you'd like to eat them. Make sure to store them properly to avoid freezer burn.
Oh, and if you want to have them for dessert, these healthy blueberry bars go great with vanilla ice cream, a drizzle of maple syrup, or fresh whipped cream 🙂
More Healthy Breakfast Recipes
Crockpot Blueberry Oatmeal - an overnight sensation. Just put all the ingredients in your slow cooker and wake up to a healthy and delicious meal.
7 Healthy Oatmeal Bar Recipes - pick your favorite flavor and enjoy a healthy breakfast every day of the week.
Apple Cinnamon Crockpot Oatmeal - wake to one of the best-tasting breakfast recipes!
Apple Oatmeal Bars - Bursting with fresh apples and hearty oats, these bars are the perfect balance of comfort and nutrition.
Love this Blueberry Oatmeal Breakfast Bars recipe? Please leave a 5 star ⭐️⭐️⭐️⭐️⭐️ rating in the recipe card below ⬇️ and/or a review in the comment section further down.
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Printable Recipe
Easy Blueberry Oatmeal Bars Recipe
Equipment
- 8x8 inch baking pan
- mixing bowl
- small bowl
Ingredients
Crust & Crumble Topping
- 6 Tablespoons butter (melted (you can substitute coconut oil))
- 1 teaspoon real vanilla extract
- 1½ cups white whole wheat flour ((you can substitute regular flour))
- 1½ cups old fashioned oats ((not instant))
- ½ cup honey
- ¼ cup brown sugar
- ½ teaspoon ground cinnamon
- pinch salt
Blueberry Filling
- 2 ½ cups fresh blueberries
- 2 tablespoon fresh lemon juice
- 2 teaspoons corn starch
- ¼ cup coconut sugar ((you can substitute regular sugar))
Instructions
- Preheat oven to 350 degrees F.
- Line the bottom of an 8x8 pan with parchment paper, foil, or with cooking spray.
- To make the crust & crumble, place the whole wheat flour, regular oats, honey, brown sugar, ground cinnamon, and salt in a large bowl. Stir in melted butter and vanilla until just combined. The mixture should be a little dry and crumbly. Reserve 1 cup of the mixture, this will be your crumble topping.
- Add the oat mixture to the prepared baking pan. Press mixture into the bottom of the pan in an even layer.
- Place blueberries, lemon, coconut sugar, and corn starch in the same bowl you mixed the oat mixture and stir to combine. Place the blueberries over the crust in an even layer.
- Evenly sprinkle the remaining crumble mixture over the top of the blueberries.
- Bake the bars for 45 minutes. Remove the bars from the pan and let sit for 10 minutes. Cut and enjoy!
Video
Notes
- OATS: This recipe is best if you use old-fashioned oats, not instant oats.
- FLOUR: We like using the healthy option of whole wheat flour, but regular flour would also work.
- SWEETNER: Readers often use maple syrup instead of honey with great results.
- STORING: To store, layer the bars between waxed paper in an airtight container. Keep in the refrigerator for up to 5 days. Bring back to room temperature before serving. Blueberry Oatmeal Bars can be frozen for up to 3 months in an airtight container.
Nutrition
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Joni says
This was perfect!! I cooked it a little less than 40mn. But I didn’t change anything else. Loved it!!
Rachel says
The flavor is delicious! And I was able to find the most beautiful, plump blueberries for it! But my oat mix was quite sticky and thick. Definitely hard to spread. I barely had enough to cover the bottom of the 8 x 8 dish. I must have messed up one of the measurements without realizing it. I’m going to try again next week and try another readers advice and add some walnuts! Question - it shows the serving size as 16 pieces… how is that possible in a 8 x 8? Or is that a typo?
Jibby says
Hii. Just wanna say thank you so much for the recipe it’s taste amazing. I love the taste.
Can I ask u one question my crumble a little bit burn and I baked less than 45 mins. Did I do something wrong ? Thank you so much ❤️
Erin Henry says
Hi Jibby, We're so glad you liked it. It's one of our most popular recipes! As for your question, all ovens cook differently. If yours runs a little hot, the 45 minutes could be too long. Also, where you place the pan in the oven makes a difference. If it was too close to the top of the oven, the crumble could have cooked faster. Next time, try 40 minutes and see how it goes!
LuAnn says
Can this recipe be doubled for a 13x9 baking pan? These bars look amazing delicious 😋. Thanks for sharing.
Erin Henry says
The recipe is written for a 8 x 8 pan, so it doesn't double to a 13x9 inch pan. I think you could try it, but you'd have to watch the cooking time since I don't know the adjusted time for a larger pan.
M.L. says
Loved these so much. They were. Very simple to make with the easy to follow recipe. The family devoured them.
Erin Henry says
Awesome! This is a simple recipe that families seem to devour!
Ann says
They're a favorite go to of mine for my grandsons. Easy to make and the kids love them! I usually use frozen blueberries because I don't have fresh. These seem to work fine too.
Erin Henry says
Yes, this recipe is great year-round since you can use fresh or frozen blueberries. So glad your grandson loves them!
BJ says
These are delicious! Not overly sweet. Will make again for sure!
Erin Henry says
Yes, that's what we love about them, BJ. Not too sweet, but incredibly delicious. Like a fruit crisp!
Jp says
Very yummy, definitely a keeper!
Erin Henry says
Thanks for trying the recipe! It's a summer favorite!
Vanessa says
Thanks for sharing! Do they keep long?
Erin Henry says
One of our favorites, Vanessa! They keep for about a week in the refrigerator or a about 3 months in the freezer.
Suzanne says
This looks so good! Do you use this crumble for any other recipes?
Erin Henry says
We like the crumble on our Banana Bread as well. https://www.suburbansimplicity.com/best-banana-bread/. It would be good on Pumpkin Muffins too https://www.suburbansimplicity.com/the-best-pumpkin-spice-muffins/.
Enjoy!
Mary says
Love these so much better than cereal bars. I added 1/4 cup of flax meal and some walnuts in the topping. No one notices how healthy these are! Just yum!
Erin Henry says
We love your addition and toppings, Mary! Yes, they taste so good no one realizes they're healthy!!
Karen says
These are fantastic. So glad I found this recipe.
Erin Henry says
Yay! We're so glad to hear it, Karen! We just love this recipe no matter what time of the year! Thanks for the 5-star review!
Corliss Vargo says
I baked the blueberry oatmeal bars for a neighborhood bbq and it was such a hit with kids and parents. Everyone is waiting for me to bake again soon. So delicious and happy to add to my list of goodies I share with family and friends.
Erin Henry says
Love hearing this, Corliss! These bars are the perfect recipe to share with family and friends--they are universally loved!
Natasha says
So delicious and healthy at the same time. Can't wait to try this, I'm sure my family will love this!
Erin Henry says
It's wonderful with fresh or frozen blueberries, so a nice recipe to make year-round!
Krissy Allori says
Yum! I am so glad I froze a bunch of blueberries this summer so I can have this awesome treat! So good!
Erin Henry says
Freezing berries at their peak of freshness is the best way to do it. The perfect way to use them up is in this recipe!
Chelsea says
These bars are seriously sooo delicious!! We're obsessed! Thanks for sharing!
Erin Henry says
We're obsessed too, Chelsea! We get so many compliments on this recipe.