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Super simple Cinnamon Sugar Blueberry Crumb Bars. These bars are berry-filled, extra jammy, buttery, and oh so delicious. The base is a simple salted butter crumb dough sweetened with golden brown sugar. The filling has hints of lemon and is made with fresh blueberries and blueberry jam…for the maximum berry experience. And the final buttery crumb layer is tossed in cinnamon-sugar, creating the ultimate extra sweet topping. Put everything together and you have a blueberry crumb bar that’s buttery, jammy, sweet, cinnamony, and layered with deliciousness. These bars are everyone’s summer favorite.

This post is sponsored by Land O’Lakes.

overhead photo of Cinnamon Sugar Blueberry Crumb Bars

All Tuesdays are made better with something sweet, don’t you think? Especially when it’s summer and there are so many sweet berries and stone fruits to be baking with.

It’s funny, sometimes all I want to make are savory recipes. But then sometimes my sweet tooth kicks into high gear, and all I want to do is bake. Right now I seem to have a “summer baking bug”…and I’m not complaining one bit.

I’m so excited to be sharing these bars today. I’ve been working on them for weeks now and finally got them just right. Sometimes recipes are easy…and sometimes they require a little more time and attention. These are an example of the latter, but the added effort and multiple rounds of testing were worth it.

I could not love these simple blueberry crumb bars more. I rarely ever think a recipe is “perfect”, but these are pretty darn close.

Extra buttery, soft, sweet, gooey, filled with blueberries and hints of both vanilla and cinnamon. Honestly? These are the fruity bars you need to make this summer.

And super pretty, which I love!

overhead prep photo of Cinnamon Sugar Blueberry Crumb Bars before baking

Jumping right into the details…

As mentioned, these bars are easy to bake up and require very little prep work.

First things first, there are three very important ingredients in this recipe…the butter, the berries, and the jam.

Let’s start with the butter, as I think it’s rather important. You need to use high-quality butter here, preferably high-quality salted butter. Personally, I love using Land O Lakes® Butter. You all know it’s my go-to butter and what I use in my kitchen every day for both baking and cooking.

I love the rich buttery flavor and hints of salt in Land O Lakes® Butter. It creams wonderfully into a batter and always turns out the best brownies (like these peanut butter brownie ice cream bars) and sweet pies (like my peaches and cream pretzel pie).

A little fun fact about Land O Lakes®? They were founded in 1921 and to this day they remain farmer-owned. Today, they’ve grown into a group of more than 1,700 family-owned dairy farmers. I love that such a huge brand has remained true to its core values. To me, this makes their butter that much better.

overhead prep photo of Cinnamon Sugar Blueberry Crumb Bars before baking

Moving on to the berries…I really wanted them to burst in your mouth, but yet be jammy too. Enter the combination of fresh blueberries and sweet blueberry jam.

Using a combination of fresh berries and sweet jam adds so much flavor and texture. The fresh blueberries provide a burst of flavor with every single bite. But the jam makes the bars extra sweet, gooey, and yeah – jammy. I LOVE the combo. It’s the secret to making these crumbs bars some of the very best. If you haven’t tried using jam in addition to fresh berries in your baked sweets, you have to trust me and give it a try.

front on photo of Cinnamon Sugar Blueberry Crumb Bars

Assembling the bars.

For the dough, just mix the butter with flour, brown sugar, and a pinch of salt. Press half the dough into a baking pan, reserving the remaining dough for the topping. Then add the berries and jam. I like to toss the berries with a bit of lemon and vanilla for added flavor.

Now, with the reserved dough, toss it with sweet cinnamon-sugar. Yes, cinnamon-sugar. It’s that extra-special touch I love to incorporate into recipes. The cinnamon creates a warming bar and highlights the sweetness and saltiness within the berries and butter.

Crumble the cinnamon-sugar dough over the bars…and bake. About 30 or so minutes later you’ll have a kitchen that smells wonderful, and bars that look even better.

overhead close up photo of Cinnamon Sugar Blueberry Crumb Bars

These are great as a sweet breakfast, afternoon snack, or after-dinner dessert. Oh, and eating them warm, right out of the pan, isn’t technically what you’re supposed to do, but it sure is delicious.

I’ll let you make the call on how to eat them. But you guys know me, I’m all about warm, right out of the pan…maybe even add some ice cream? Yeah, that would be delicious!

overhead photo of Cinnamon Sugar Blueberry Crumb Bar

Looking for other berry recipes? Here are a few ideas: 

Jammy Raspberry Cream Pretzel Hand Pies

Jammy Strawberry Galette

Skillet Strawberry Bourbon Cobbler with Layered Cream Cheese Biscuits

Lastly, if you make these cinnamon sugar blueberry crumb bars, be sure to leave a comment and/or give this recipe a rating! Above all, I love to hear from you guys and always do my best to respond to each and every comment. And of course, if you do make this recipe, don’t forget to tag me on Instagram! Looking through the photos of recipes you all have made is my favorite!

Watch the How To Video:

Cinnamon Sugar Blueberry Crumb Bars

Prep Time 15 minutes
Cook Time 45 minutes
Total Time 1 hour
Servings: 16 bars
Calories Per Serving: 159 kcal

Nutritional information is only an estimate. The accuracy of the nutritional information for any recipe on this site is not guaranteed.

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  • 1. Preheat the oven to 350 degrees F. Line an 8x8 square inch baking dish with parchment paper.
    2. In a large bowl, beat together the flour, brown sugar, salt, and Land O Lakes® Butter, until a crumbly dough forms. If the dough seems dry, add 1 tablespoon water.
    3. Press 1/2 of the dough into the bottom of the prepared baking dish. To the remaining dough, add the granulated cinnamon and sugar.
    4. In a bowl, toss together the blueberries, cornstarch, vanilla, and lemon zest. Spoon the berries evenly over the dough. Dollop the jam over the berries. Sprinkle the remaining cinnamon-sugar dough over the berries. Transfer to the oven and bake for 45-50 minutes, until the crumble is a light golden brown.
    5. Let cool completely before cutting into the bars. Keep stored in a sealed container for up to 1 week. 
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  1. 5 stars
    Super simple is on point for this one – so easy and delicious!!! Great way to use some fresh Alaskan blueberries 🙂 I used coconut sugar for brown sugar (unintentionally), and it worked perfectly. Also, I don’t mind the one cup of butter…makes it all the better! Gotta live life a little!

    1. Hey Maggie,
      Happy Wednesday! Thanks a bunch for making this recipe, I am so glad to hear it was a winner:) xTieghan

  2. Hiiiii ! Do you think you can omit the cornstarch? Or is there a corn free subsitute?
    Also, could I add pistachios you think? Thank you!

    1. Hey Paola,
      You can use arrow root in place of the corn starch, I am not sure pistachios would be the best option for this recipe. I hope you love them! xTieghan

  3. Hi! I love your blog and all your recipes. My mom made this recipe and it was amazing but when I made them they were super soggy and soup like. I doubled the recipe just like she did. Any idea what I did wrong?

    1. Hey Teresa,
      So sorry you have issues with this recipe, next time I would try not doubling it and following as is. I hope you love the recipe! xTieghan

    2. My first try came out more like cobbler and after making them again, I realized I needed to let them cool completely before taken them out of the pan. But, even though my first attempt “failed” it was still one of the best desserts I’ve ever had.

      1. Hey Tracy,
        Love to hear this! Thanks so much for giving the recipe a try, I am so glad it was enjoyed! xTieghan

  4. 5 stars
    Absolutely divine! I used a mixture of raspberries, blueberries, and blackberries, and just used extra berries and some honey instead of jam. It worked great! Super delicious and the texture of the crust is amazing.

    1. Hey Laure,
      The sugar gets added in step 3. I hope you love the recipe, please let me know if you have any other questions! xTieghan

  5. 5 stars
    Absolutely delicious! Every time we make this at home it’s gone by the end of the next. The blueberries come through the perfect amount and its moist and that crumble, omg, i want to put it on everything!

  6. I made this as a dessert this evening and it was unbelievable. I had to cook a little longer (10 mins) as our oven is older, but came out perfectly. It’s so hard not to eat a dessert right away when it’s done, but after letting it cool it was amazing!! I will definitely make again. Thanks!!

  7. 5 stars
    I printed the recipe before the brown sugar correction and forgot to add it. They are still sooo good. I used a really nice blueberry jam. It’s a small pan and will go fast so I will remake them with the brown sugar soon. I still have berries and jam and butter! They are like a pie bar.

  8. 5 stars
    I was amazed at how delicious this was given how simple the recipe is!! I did reduce the sugar by 1/4 cup, and I replaced 1/2 cup of flour with quick-cook oats. I also added a sprinkle of thyme into the dough, inspired by Tieghan 🙂 Highly recommend!!

  9. 5 stars
    Made these tonight, they are excellent! Definitely rich but I knew that going in. I used 2/3 of the flour mix as the base and 1/3 for the topping to make the topping slightly more sparse. They are too rich and sweet for me to eat for breakfast as was suggested in the notes, but served warm with a scoop of vanilla ice cream on top made for a great dessert!

    1. Hey Jonette,
      I haven’t tested this, but would not recommend. If anything try using a vegan butter. I hope you love the recipe, please let me know if you have any other questions! xTieghan

  10. I was excited by this recipe because I liked the idea of using blueberry jam and fresh blueberries – until I saw the RIDICULOUS amount of butter that it calls for. One cup of butter is far too much for such a small pan of bars. I understand that you were paid by Land O’Lakes to create this recipe, but that is no excuse for creating an unhealthy calorie bomb. I would not serve such an unhealthy dessert to my family.

    1. Hi Susan! I am sorry this seems like too much for you.. I have plenty of other recipes that are a bit healthier! I hope you love some of them! xTieghan