Blueberry Oat Bars

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Blueberry Oat Bars are made with good-for-you ingredients like fresh blueberries, rolled oats, and protein-packed Greek Yogurt. Way lighter than your favorite coffee shop treats and just as delicious, these healthy oatmeal bars are bound to become your new favorite on-the-go morning treat.

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Ever since I posted my recipe on Strawberry Oatmeal Bars, I’ve been flooded with requests to make oatmeal bars with blueberries. Apparently, my story of visiting my local coffee shop for a treat after a tough day at work really hit home with a lot of you. And I’m always happy to take on a challenge—and by challenge, I mean being to resist these bars long enough to snap a few photos.

These blueberry oat bars turned out absolutely crave-worthy, maybe even better than the ones I remember from that coffee shop! My version is made with much cleaner ingredients, while still remaining an absolutely decadent treat. These oatmeal bars are perfect for grabbing on your way out the door, packing in your kids’ lunch boxes, and enjoying with the family in the morning.

Serve these for the perfect on-to-go healthy breakfast or snack options. Or get fancy and create an Instagram-worthy dessert board by serving these bars with fresh fruit and Cool Whip. You could even dip them in some melted dark chocolate for an extra decadent treat. The options are all divine, so let’s just get down to the good stuff.

Ingredients for blueberry oatmeal bars with rolled oats, blueberries, butter, yogurt, cinnamon, and eggs.

What You’ll Need

The ingredients for this recipe are simple pantry staples and ingredients you probably already have at home, making this the perfect anytime recipe. Below are some of the key ingredients you’re going to need to bring these blueberry oat bars to life!

  • Blueberries: The star of the show! I prefer to start with fresh blueberries, but frozen blueberries would work fine as well if it’s not blueberry season. Just make sure to thaw them first and pat them dry with paper towels before using.
  • Rolled Oats: I’ve found that rolled oats are the best type of oats to use for baking recipes like this one. I wouldn’t recommend swapping them out for instant or steel cut oats.
  • Brown Sugar: I love the depth of flavor that brown sugar offers, with subtle notes of caramel and molasses. For a refined sugar-free version, feel free to use coconut sugar instead.
  • Flour: My trick to keeping this oat bar recipe on the healthier side while still making sure they taste like those decadent coffee shop bars is using a combination of regular all-purpose flour and whole wheat flour.
  • Egg: This serves as a binder to keep our bars from falling apart when you cut into them.
  • Butter: In addition to working with the egg to bind our bars together, butter also enhances the rich flavor, soft texture, and golden color of the dish.
  • Greek Yogurt: This ingredient adds tons of protein and probiotics, while contributing to the ultra-soft texture of the bars.
  • Honey: A drizzle of honey adds a touch of extra sweetness and a little stickiness to help bind the ingredients together. For a vegan option, swap the honey for maple syrup or agave.
  • Baking Soda: Baking soda helps the bars rise a little during baking and helps with the soft, delicious texture.
  • Salt: Don’t forget about the salt. Not only does it activate the baking soda, but it’s also a great way to balance all the sweetness and enhance the flavor profile.
  • Balsamic Vinegar: Just a tablespoon of balsamic vinegar does a wonderful job of enhancing the flavor of the blueberries, making them even more delicious. This is optional, but it’s my secret trick for getting the best blueberry oat bars!

Blueberry oatmeal bars with whole blueberries and a crumbly topping on a piece of parchment paper

Recipe Tips for the Best Blueberry Oat Bars

While these blueberry oat bars are perfection just as they are, you can always play around with the ingredients based on the week and what you have lying around. From switching up the fruits to adding your favorite ingredients, there are plenty of ways to customize this recipe.

Here are some of my favorite tips and variations for these healthy oatmeal bars:

  • Rolled vs quick oats. Choosing the right type of oats is crucial in determining how your bars will turn out. Rolled oats stand up better in the oven, resulting in a firmer texture. On the other hand, quick oats will be less chewy than rolled oats and less uniform in texture.
  • Switch up the fruit. When it comes to these bars, anything goes. I went with some blueberries, but you could use other berries and fruits like cranberries, strawberries, cherries, bananas, or even a mix of fruits.
  • Add some nuts. You really can’t go wrong with adding chopped nuts like walnuts, pecans, and almonds. Toast them first to get a more pronounced flavor or bake them raw and enjoy the nutty flavor and added crunch.
  • Use more parchment paper. This is a tip that I came across on Pinterest and it’s honestly such a lifesaver. Use a larger sheet of parchment paper so that you can easily lift the bars after they’re done baking. Makes for a much easier time for cutting and clean-up!
  • Play around with add-ins. Make this recipe even more indulgent by adding in some chocolate chips. You could also add a pop of flavor and gooey texture by swirling in some jam or nut butter before baking the oatmeal bars.

How to Store Oat Bars

Looking for healthy breakfast meal prep recipes? You’ve come to the right place. In addition to being delicious, easy to make, and overall wonderful in every way—these blueberry oat bars are phenomenal choices for meal prep.

Once you’ve allowed them to cool down, wrap them individually in plastic wrap and transfer them to an airtight container. Then, you can store them in a few different ways:

  • On the counter for up to 3 days.
  • In the fridge for up to 7 days.
  • In the freezer for up to 3 months.

To reheat, all you have to do is let them thaw in the fridge overnight and pop them into an oven or toaster oven until heated through. It’s that easy!

Frequently Asked Questions

Here are the answers to some of the most frequently asked questions about this blueberry oat bars recipe:

I don’t recommend using instant or steel cut oats as a swap for any baked oats recipe, unless it specifically calls for that type. Both of these types call for different cooking times, meaning you won’t get the same final results. For the chewiest, best texture for your oat bars, I would stick to rolled oats.

Absolutely! Oats are naturally-gluten free, but I would always suggest checking out the labels to be on the safe side. As for the flour, you can easily swap it out for gluten-free all-purpose flour, almond flour, or a mix of both.

If your oatmeal bars keep falling apart, it’s usually an indication that your mix is too dry. Add some more binding agents like eggs and honey, and make sure that you’re using rolled oats instead of quick oats.

Oatmeal bars with blueberries stacked on each other with fresh blueberries on the side.
The Recipe
Blueberry oat bars with roasted blueberries and a oatmeal crumb topping cut into squares.

Blueberry Oat Bars

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  • 16 oz blueberries
  • 1/2 cup brown sugar, divided
  • 1 tbsp. balsamic vinegar (optional)
  • 1 1/2 cup rolled oats
  • 1/2 cup all-purpose flour
  • 1/2 cup whole wheat flour
  • 1/2 tsp salt
  • 1/2 tsp baking soda
  • 1 egg
  • 1/3 cup butter, melted
  • 1/3 cup nonfat plain Greek yogurt
  • 2 tbsp honey

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Preheat the oven to 425 degrees. Toss the blueberries with 1 tbsp. brown sugar and balsamic vinegar if using. Roast for 20 minutes in a glass pan. Set aside and let cool.

Blueberries being stirred with brown sugar and balsamic vinegar.

Turn the oven down to 350 degrees. Line a 9 X 9 baking dish with parchment paper. In a bowl, mix together the oats, flours, remaining brown sugar, salt, and baking soda. In another bowl, whisk together the egg, yogurt, melted butter, and honey. Combine the wet and dry ingredients to form a dough.

Oatmeal dough being stirred in a glass bowl.

Press 2/3 of the dough into the bottom of your baking dish.

Oatmeal bar dough being pressed into a baking sheet with parchment paper.

Pour the roasted blueberries and any juice on top. Top with the remaining dough by dropping little balls of dough, scattering them to cover most of the top. It’s fine if blueberries poke through in some spots.

Blueberries and oatemal topping being added to a baking dish.

Bake for 30 minutes and let cool for at least 30 minutes before cutting into 9 squares

Baked blueberry oat bars cut into squares on parchment paper.
Nutritional Facts
Serving Size: 1 square (129g)
Amount Per Serving
Calories 264
Calories from Fat 78
% Daily Value *
Total Fat 9g
Saturated Fat 5g
Monounsaturated Fat 0g
Polyunsaturated Fat 0g
Cholesterol 39mg
Sodium 218mg
Total Carbohydrate 43g
Dietary Fiber 3g
Sugars 21g
Protein 5g

* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Nutritional Values provided are estimates only and may vary based on the preparation method.

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About the author Meet Kristen McCaffrey
Hi, I’m the cookbook author, recipe developer, and food enthusiast behind Slender Kitchen. I am obsessed with making healthy food that is easy to prepare and absolutely delicious. Meal planning is my secret weapon and I hope I can make meal time easier for you with our tried and tested recipes and foolproof meal plans. Learn More
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