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 |
4.27 from 95 votes

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

The Recipe

Cinnamon Sugar Blueberry Crumb Bars

These super simple bars are buttery, jammy, sweet, cinnamony, and layered with deliciousness. They're everyone’s favorite bar!

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



  1. 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. 

overhead horizontal photo of Cinnamon Sugar Blueberry Crumb Bars