Home » Blog » Vegan Summer Recipes » Blueberry Oat Bars

Blueberry Oat Bars

4.66 from 55 votes

This post may contain affiliate links. Read my disclosure policy.

Sharing is caring!

These Blueberry Oat Bars are so yummy! Oil-free, refined sugar free, and whole grain – they are so healthy you can eat them for breakfast!

Plate with two Blueberry Oat Bars and some fresh blueberries. More bars in the background.

As an Amazon Associate, I earn from qualifying purchases. This post may contain affiliate links.

I’ve been feeling blue lately, but in a happy way.

For the last few weeks I’ve been getting a wonderful harvest from my blueberry bushes. The first few days of picking, I had a garden friend who was not a bluebird of happiness.

It was a bluejay who was anything but happy with me. This little guy would perch on the fence near the blueberries and squawk loudly at me. Then move to the nearby pear tree, followed by the raspberry trellis, and the apple tree, rotating around me squawking from every angle.

He definitely wanted to let me know that I had no business picking his berries!

Blueberries ready to pick

In the end, I think we came to an understanding. There were enough berries for me to pick and put up for the season, with a few extra for my bluejay buddy and his bird friends to enjoy.

I love using these berries in so many ways, and fortunately I have enough to enjoy some fresh and also freeze plenty to get me through the year.

They find their way into muffins, pancakes, smoothies, oatmeal, berry sauce, and now these blueberry oatmeal bars.

Ingredients in these blueberry bars

For the oatmeal bars:

  • Oatmeal – I used regular oats, but quick oats can be used
  • Whole wheat flour – for gluten free bars, use a gluten free flour blend
  • Baking powder
  • Salt
  • Maple syrup
  • Applesauce
  • Vanilla

For the filling:

  • Blueberries – fresh or frozen
  • Maple syrup
  • Lemon juice
  • Cornstarch
  • Vanilla
  • Water

For the optional lemon glaze:

  • Powdered sugar – this does add a small amount of processed sugar to the recipe
  • Lemon juice – the lemon flavor perfectly complements the blueberries

How to Make These Blueberry Oat Bars

Step 1:

Combine the blueberries, lemon juice, and maple syrup in a medium sized saucepan. Bring the berries to a boil, stirring occasionally. Reduce the heat to simmer, and stir in the vanilla extract and the cornstarch/water mixture. Stir briefly until the filling thickens. Then set aside.

Step 2:

In a large mixing bowl, combine the oatmeal, flour, baking powder, and salt.

Step 3:

In a separate small bowl, stir together the applesauce, maple syrup, and vanilla. Stir the applesauce mixture into the oatmeal mixture, and combine well.

Step 4:

Spread half of the oatmeal mixture evenly onto the bottom of a parchment lined 9″ x 13″ baking pan. Pour the berry filling on top of this oatmeal layer and spread evenly. Take the remaining oatmeal mixture and crumble it on top of the berry layer.

Step 5:

Bake the berry bars at 350° F for 30 minutes.

After baking, let them cool to firm up.

If using the optional lemon glaze, wait until the bars are completely cool before drizzling the glaze over the bars.

Three Blueberry Oat Bars with lemon glaze stacked on a small plate. More bars in the background.

Since these bars are sweetened with maple syrup, they are refined sugar free. My husband and I enjoy the lightly sweetened taste of these bars, but if you want them to be a little sweeter, the glaze is perfect and only adds a small amount of sugar per bar. The glaze is flavored with lemon juice, which is a perfect complement to the blueberries.

These make perfect breakfast bars, can easily be packed in a lunch, or enjoyed for an afternoon snack.

For a special treat, these blueberry oat bars would be amazing topped with my vanilla ice cream or a dollop of vegan whipped cream! And if you have a nice harvest of strawberries (or even some frozen strawberries) be sure to try out my strawberry ice cream!

Explore our Plant-Based Handbook

Ad for Plant-Based Handbook with image of ebook cover and highlights of book contents.

Here are more delicious vegan desserts:

If you make this recipe, please be sure to leave a rating and feedback below. It only takes a few seconds, but helps other visitors to my site and helps my site gain other readers. Thank you for taking the time to leave your comment!

And come join my Oil Free Vegan Recipes and Support Facebook group, where you can share your favorite oil free vegan recipes, and give and receive support on your plant based journey.

Plate with two Blueberry Oat Bars and some fresh blueberries. More bars in the background.

Blueberry Oat Bars

Teresa Sklenicka
These Blueberry Oat Bars are so yummy! Oil-free, refined sugar free, and whole grain – they are so healthy you can eat them for breakfast!

4.66 from 55 votes
Prep Time 25 minutes
Cook Time 30 minutes
Total Time 55 minutes
Course Breakfast, Dessert
Cuisine American
Servings 15 bars
Calories 164 kcal


Berry Filling

  • 3 cups blueberries fresh or frozen
  • ¼ cup maple syrup
  • 1 tablespoon lemon juice
  • 2 ½ tablespoons cornstarch
  • 4 tablespoons water
  • 1 teaspoon vanilla

Oat Bars

  • 3 cups oats (regular rolled oats, not quick oats)
  • 1 cup whole wheat flour
  • 1 ½ teaspoon baking powder
  • Pinch of salt
  • 1 cup applesauce
  • ¼ cup maple syrup
  • 1 ½ teaspoon vanilla

Lemon Glaze, optional

  • ½ cup powdered sugar
  • 1 tablespoon lemon juice


Berry Filling

  • Place the blueberries, maple syrup, and lemon juice in a saucepan and bring to a boil, stirring occasionally.
  • Mix together the cornstarch and water.
  • Add the cornstarch mixture and the vanilla to the berries, and stir until the filling thickens.
  • Remove the pan from the heat and set aside.

Oat Bars

  • Preheat the oven to 350°F.
  • In a large bowl, stir together the oats, flour, baking powder, and salt.
  • In a small bowl, mix together the applesauce, maple syrup, and vanilla.
  • Pour the wet ingredients into the dry ingredients and stir together until well combined.Spread half the oatmeal mixture into a parchment lined 9” x 13” baking pan. Use your hands to press it evenly into the pan.
  • Pour the berry mixture onto the oatmeal layer and spread it evenly.
  • Take the remaining oatmeal mixture and crumble it on top of the filling.
  • Bake in a 350°F oven for 30 minutes.

Lemon Glaze, optional

  • For the lemon glaze, combine the powdered sugar and lemon juice, and stir until there are no lumps. Add additional powdered sugar or lemon juice to achieve your desired consistency.
  • Drizzle the glaze over the completely cooled bars.


For gluten free Blueberry Oat Bars, use a gluten free flour blend in place of the whole wheat flour.
The Nutrition facts have been calculated with the optional lemon glaze.


Calories: 164kcalCarbohydrates: 35.7gProtein: 3.5gFat: 1.4gSodium: 91.9mgFiber: 3.4gSugar: 15.1gCalcium: 5mgIron: 7mg
Keyword Bars, Blueberries, Dessert, Oatmeal, Oil Free, Whole Grain
Tried this recipe?Let us know how it was!

Nutrition calculations are approximate.

By on July 18th, 2019

About Teresa Sklenicka

I love creating tasty, oil-free, vegan recipes that everyone will love (even non-vegans)! Here you'll find vegan versions of your favorite comfort foods, as well as some new tastes! Join me on a path to improving your health, helping the planet, and saving animals.

More posts by this author.

25 thoughts on “Blueberry Oat Bars”

  1. 5 stars
    I loved the filling on this, very tasty. Id like to play around with the oat mixture and find a way to make it lighter or maybe I just needed thinner layers, either way a great, healthy recipe!!! <3

  2. 5 stars
    My neighbor I shared these with gives them a 5 star. He thinks these would be great to take when they go quading in the desert. He liked them very much and would be happy if I made them again! LOL

  3. 4 stars
    I think these are very good. My husband said he liked them but did not go back for a second. He likes things pretty sweet. I’m thinking next time I will add cinnamon and nutmeg to the oat mixture. They are not sweet. The oatmeal is a bit tougher texture due to using applesauce in place of oil – I’m okay with that to be free of the oil and fats that are normally in this type of bar. I used frozen blue berries. I had no trouble with mushy or dry bottom crust. I cooked 30 min 350 on convection bake. I used parchment paper. I will definitely make again

    • I’m not sure if that would work. Maybe if you re-hydrated them. Frozen blueberries work well, if you don’t have fresh.

  4. 5 stars
    Delicious but the bottom was a bit dry for me. Is there a way to make them a bit softer? Would adding more applesauce help?

    • That’s too bad. I’m not sure what would have caused that. Next time try either reducing the applesauce a bit, or bake them a little longer.

  5. I am sooo confused. It never says in the description to make any oatmeal. It just says three cups of oats. So when do we make the oatmeal and how many dupes of water for the oats? Just double as regular??????

    • I’m so sorry for the confusion! The oats are not pre-cooked. They’re mixed in with the dry ingredients, then the wet ingredients in the recipe are mixed in. No water is needed.


Leave a Comment

Recipe Rating