Easy Blueberry Oatmeal Bars
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!
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, 1/2 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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Easy Blueberry Oatmeal Bars Recipe
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)
Equipment
- 8×8 inch baking pan
- mixing bowl
- small bowl
Instructions
- Preheat oven to 350 degrees F.
- Line the bottom of an 8×8 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!
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.
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I made these but I soaked the rolled oats in organic plain kefir overnight. What an amazing oat bar!!!!! Absolutely perfect … not to sweet-super filling, and I cut my pan into 20 squares only 239 calories per square ? amazing!!!!! so so so good! my wasn’t dry or crumbly at all.
So glad you liked it!!! I love the idea of soaking the oats in kefir…might have to try that myself!
I made these yesterday, mine got gummy, thick in the middle. I baked them the full amount of time. I like the crumbles with the blueberries, but my base was thick and kind of gummy. What do you think I did wrong? I will try to make them again thank you.
Good question, Tammy. I know you said you baked the full amount of time, but it seems like they were a little under-baked. If you used a glass pan, I would up the baking time slightly.
I thought I’d ruined these because I hadn’t properly thawed my blueberries. There was blue liquid around them when I took them out of the oven, but I went ahead and let them fully cool in the pan, cut them and put them in a container in the fridge overnight. They set right up in the fridge and were a huge hit at my work breakfast potluck. I got a lot of compliments, so thank you for making me look good with a recipe that worked despite my impatience! I’ll definitely be making these again.
Just made this today and will make again. Fantastic and substantial! Thank you!
So glad you like it so much, Sandy! It’s one of our favs!
This is my favorite recipe to make when I have fresh blueberries. I use maple syrup instead of the honey and it works beautifully. The entire pan usually disappears within a couple of hours.
These bars are amazing!! Will make them again.
Thanks for giving them a try, Mona! They are delish and very popular with our readers.
I was very disappointed that these “bars” are so difficult to cut. I suppose
this recipe is meant to be a crumble. It tasted very good and not super sweet.
It was a mess in trying to cut into squares so definitely will not be used on my
cookie platters that I give out for gifts.
Turned out very dry, needs a little extra something – applesauce? Even water? Would have been nice to have some more chewiness or cohesiveness.
It’s more of a crumb topping, so on the dryer side. Make sure you don’t over bake as it will become dry.
I make these all the time. My husband has some dietary limitations–no wheat, corn, or honey–so I sub whole oat flour, tapioca starch, and maple syrup for the wheat flour, cornstarch, and honey. Also, since I always use frozen blueberries I cook the berries up with the coconut sugar, lemon juice, and tapioca starch before putting them on the crust. We love these! I don’t find them dry at all–in fact, with the melted butter and maple syrup, it’s a pretty sticky dough rather than a crumbly topping. It works great, though! I always double the recipe and put in a 9×13 pan, and store the bars in the freezer. I’ve also substituted frozen strawberries for the blueberries and they were very good as well.
So glad you found a recipe that works for you and your husband, Kaari. You’re so smart to double the batch and freeze some for later. So efficient!
I thought these were just “OK.” I try to eat healthy foods and will swap in healthy ingredients in many recipes. The filling was sweet but the rest was not. Maybe a different mixture for the topping would have made them better. I ate them but would not make them again.
This was perfect!! I cooked it a little less than 40mn. But I didn’t change anything else. Loved it!!
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?
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 ❤️
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!
Can this recipe be doubled for a 13×9 baking pan? These bars look amazing delicious ?. Thanks for sharing.
The recipe is written for a 8 x 8 pan, so it doesn’t double to a 13×9 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.
Loved these so much. They were. Very simple to make with the easy to follow recipe. The family devoured them.
Awesome! This is a simple recipe that families seem to devour!
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.
Yes, this recipe is great year-round since you can use fresh or frozen blueberries. So glad your grandson loves them!
These are delicious! Not overly sweet. Will make again for sure!
Yes, that’s what we love about them, BJ. Not too sweet, but incredibly delicious. Like a fruit crisp!
Very yummy, definitely a keeper!
Thanks for trying the recipe! It’s a summer favorite!
Thanks for sharing! Do they keep long?
One of our favorites, Vanessa! They keep for about a week in the refrigerator or a about 3 months in the freezer.
This looks so good! Do you use this crumble for any other recipes?
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!
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!
We love your addition and toppings, Mary! Yes, they taste so good no one realizes they’re healthy!!
These are fantastic. So glad I found this recipe.
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!
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.
Love hearing this, Corliss! These bars are the perfect recipe to share with family and friends–they are universally loved!
So delicious and healthy at the same time. Can’t wait to try this, I’m sure my family will love this!
It’s wonderful with fresh or frozen blueberries, so a nice recipe to make year-round!
Yum! I am so glad I froze a bunch of blueberries this summer so I can have this awesome treat! So good!
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!
These bars are seriously sooo delicious!! We’re obsessed! Thanks for sharing!
We’re obsessed too, Chelsea! We get so many compliments on this recipe.
what degree do you bake them at?
Bake them at 350 degrees, Aman.
I’ve made this several times, both with frozen blueberries and a batch with frozen cranberries and leftover homemade cranberry sauce. They are amazing! I always double the batch and cook on a sheet pan.
I have made with coconut oil and with butter – both taste amazing. I use maple syrup instead of honey because I don’t like honey. I also put about 1/8 cup less syrup and use water to equal the 1/2 cup to make it less sweet. I omit the sugar in the blueberry mixture as well. It’s still plenty sweet! I use all purpose flour.
Thank you for this delicious recipe!!
Frozen blueberries are a good way to make this recipe year-round! So glad you like it Melanie! We like the taste of maple syrup too! How great you’re making it with less sugar!
Outstandingly easy and great tasting. I will definitely make these again.
So glad to hear it, Adele! This is a fan favorite all year round!
Not too sweet, just perfect. It’s a favourite here!
So glad to hear it!! It’s a favorite around here too!
I used manuka honey, and subbed one for one gluten free flour. They didn’t disappoint! ????
Yay!! So glad to hear it, Janna! This is a versatile recipe that seems to work for a lot of dietary restrictions. Thanks for the 5-star review! xo
Just put them in the oven and realized I forgot to add the honey… not sure if it was there to help hold them together or for sweetness but we shall see what happens!!
Oh, no! Hopefully your recipe turns out well! The honey is for sweetness, so you may need to drizzle with maple syrup after it’s baked.
I couldn’t decide if I wanted to make the blueberry or strawberry version so I did half and half- so glad I did because they were both delicious! I added chia seeds into the berry mix and used all coconut sugar instead of brown sugar to make it a little less sweet for breakfast…but would be so good with brown sugar for dessert (plus vanilla ice cream!) Thanks for the recipe- my daughter loved it!:)
Hi Candace, I love your half and half idea! So clever! I love adding chia seeds too–just a little added nutrition! Vanilla ice cream is a favorite around here when serving this recipe as a dessert!
Delicious! Just made them with frozen blueberries. I rinsed the berries and patted them as dry as possible first. Also used an extra teaspoon of starch as recommended in the reviews. I also cut the sugar in the recipe almost in half since I don’t like really sweet stuff and it seemed like a lot of sugar. The bars turned out perfect. Just the right sweetness. Perfect texture.
Not soggy or dry. Love the slight Tang of the lemon juice. Will definitely be using this recipe again! Thank you.
Yay! I’m so glad your modifications turned out so well! I prefer my bars with just a little sweetness, too, so good thinking on reducing the sugar. Thanks for stopping by and trying the recipe! xo
Has anyone tried frozen blueberries?
Hi Donna, I’ve never tried it with frozen berries, but I think it would be doable. I would just make sure you have some added cornstarch or thickener because the berries will have a higher water content. Let me know how it goes!
Hi! This recipe looks amazing! Will steel cut oats work? Thanks!! Danielle
Good question, Danielle. We don’t think the recipe will turn out the same if you use steel cut oats.
These are fabulous and so easy! I’ve made a half dozen batches since trying. Thanks for the recipe!
Yay! I’m so glad to hear it, Katie! These bars are a favorite around here too!
Thanks for great recipe, Erin! I tried your strawberry bars and we loved it! I am sure this one works well too. I’d like to add some nuts in filling, what do you recommend?
Good question, Dina. How about some pecans? They’d go nice with the sweetness of the blueberries. Let me know how it goes!
Do you think this recipe would work well with fresh peaches?
Good question, Tammy. I haven’t tried it, but my initial thought is that the peaches have more water content than blueberries, so it may get kinda mushy. However, you could try adding a thickener like flour or corn starch to soak up some of the liquid. The flavor would be amazing! I may have to play with the recipe some day and see if I can get it to work since I love the idea!
As soon as I got home from the store and work that night I made the delicious blueberry bars. My daughter awoke from the wonderful smell of the blueberries and oats!!!Wow what great flavor can’t wait to make some more.
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It warms my heart to hear this! Love a house that smells of fresh baked goods!
I just want to be sure that the recipe is 1/2 a stick of butter, not 1/2 cup of butter.
Thanks for inquiring, Stephanie. I just updated the recipe because 6 tablespoons seems to be the right amount to make this recipe the perfect consistency. So not quite a 1/2 cup, but more than 4 tablespoons.
This looks fabulous and I can’t wait to try it.
Thanks for the 5 star rating! I think you’ll really like it! So yummy with the crumbly topping, yet more nutritious than packaged bars.