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?
Our 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!
Table of Contents
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 - 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!
How to Make - 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, place all your dry ingredients for the main recipe, including rolled oats and ½ cup honey, plus the 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, corn starch, 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 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.
They contain more water content when frozen, 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
Recipe Tips & Tricks
- This breakfast oat bar recipe is best if you use old-fashioned oats, not instant oats.
- We like using the healthy option of whole wheat flour, but regular flour would also work.
- 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.
Can You Freeze Oatmeal Bars?
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.
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!
What to Serve with Blueberry Oatmeal Bars!
Oh, and if you want to have them for dessert, these healthy blueberry bars go great with vanilla ice cream or fresh whipped cream 🙂
Items Used to Make These Bars
More Healthy Breakfast Recipes
Crockpot Blueberry Oatmeal - an overnight sensation. Just put all the ingredients in your slow cooker and wake 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!
Quinoa Frittatas - mini egg cups packed with protein and great flavor!
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Easy Blueberry Oatmeal Bars Recipe
Equipment
- 8x8 inch baking pan
- parchment paper
- 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
- This recipe is best if you use old-fashioned oats, not instant oats.
- We like using the healthy option of whole wheat flour, but regular flour would also work.
- Readers often use maple syrup instead of honey with great results.
- 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.
Nutrition
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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.
Aman says
what degree do you bake them at?
Erin Henry says
Bake them at 350 degrees, Aman.
Melanie says
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!!
Erin Henry says
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!
Adele says
Outstandingly easy and great tasting. I will definitely make these again.
Erin Henry says
So glad to hear it, Adele! This is a fan favorite all year round!
Ulanda says
Not too sweet, just perfect. It’s a favourite here!
Erin says
So glad to hear it!! It's a favorite around here too!
Janna says
I used manuka honey, and subbed one for one gluten free flour. They didn't disappoint! ????
Erin says
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
Ashley says
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!!
Erin says
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.
Candace says
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!:)
Erin says
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!
Knucklebaby says
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.
Erin says
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
Donna says
Has anyone tried frozen blueberries?
Erin says
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!
Danielle says
Hi! This recipe looks amazing! Will steel cut oats work? Thanks!! Danielle
Erin Henry says
Good question, Danielle. We don't think the recipe will turn out the same if you use steel cut oats.
Katie Anderson says
These are fabulous and so easy! I've made a half dozen batches since trying. Thanks for the recipe!
Erin says
Yay! I'm so glad to hear it, Katie! These bars are a favorite around here too!
Dina says
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?
Erin says
Good question, Dina. How about some pecans? They'd go nice with the sweetness of the blueberries. Let me know how it goes!
Tammy says
Do you think this recipe would work well with fresh peaches?
Erin says
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!
C,Rozhon says
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.
.
Erin says
It warms my heart to hear this! Love a house that smells of fresh baked goods!
Stephanie says
I just want to be sure that the recipe is 1/2 a stick of butter, not 1/2 cup of butter.
Erin says
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.
Carol says
This looks fabulous and I can't wait to try it.
Erin says
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.