A single slice of Blueberry Pie Bars with a crumble topping on a white plate.

Blueberry Pie Bars: 1 Luscious Recipe

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August 10, 2025

There’s just something magical about a dessert you can just pick up and eat, right? Especially when it tastes like a slice of pure blueberry pie, all wrapped up in a convenient bar? That’s exactly what these Blueberry Pie Bars are all about. They’re like a little hug for your taste buds! My own kitchen is usually a happy, messy place filled with experimentation, much like Catherine says about her beginnings, where the best recipes often come from a mix of tradition and a little bit of intuition. These bars have become our go-to for picnics, after-school snacks, or honestly, just because we’re craving that perfect balance of sweet, juicy blueberries and a tender, crumbly crust. I just know you’re going to love them!

Why You’ll Love These Blueberry Pie Bars

Seriously, these bars are a game-changer! You’ll love them because they’re just SO easy. We’re talking minimal fuss, maximum flavor. They’re perfectly handheld, making them ideal for picnics or just grabbing a bite on the go. Plus, they’re fantastic for making ahead, which is a lifesaver when you need a quick dessert fix. These are truly quick dessert bars that everyone will devour!

Gather Your Ingredients for Blueberry Pie Bars

Alright, let’s get everything ready! For these delicious Blueberry Pie Bars, you’ll need the usual suspects for a fantastic crumble, plus some gorgeous blueberries. Grab your flour, rolled oats for that perfect chew, brown sugar for a little extra depth, and a pinch of salt to wake everything up. Oh, and don’t forget that cold butter – it’s a must for the crumble topping getting nice and crisp. Then for our fruity filling, we’ll need plenty of fresh or frozen blueberries, a little granulated sugar with some cornstarch to thicken things up, and that hint of lemon juice and zest to make the blueberry flavor really pop. A touch of cinnamon and nutmeg just brings it all together. Easy peasy!

Step-by-Step Guide to Making Blueberry Pie Bars

Okay, let’s get down to business! Making these Blueberry Pie Bars is actually super straightforward. Trust me, even if baking feels a bit intimidating, you can totally nail this. First things first, get that oven heating up to 375°F (190°C). While it’s warming up, grab your 8×8 inch baking pan and line it with parchment paper. I like to leave a little overhang on the sides – it makes lifting the whole thing out later SO much easier.

Now, for that yummy base and crumble topping! In a bowl, just toss together your flour, rolled oats, that lovely brown sugar, and a pinch of salt. Then, work in your cold butter. You can use a pastry blender if you have one, or just your fingertips. Keep going until it looks like coarse crumbs – kind of like wet sand. Take about two-thirds of this crumb mixture and press it down evenly into the bottom of your prepared pan. This is going to be our delicious crust!

Next up, the star of the show: those gorgeous blueberries! In a separate bowl, gently mix your blueberries (fresh or frozen, either works!), granulated sugar, cornstarch, lemon juice, lemon zest, and those warming spices – cinnamon and nutmeg. Give it all a gentle toss so everything’s coated. Spoon this beautiful blueberry mixture right over the crust you just pressed into the pan. Make sure it’s spread out evenly!

Grab that leftover one-third of your crumb mixture and sprinkle it over the top of the blueberries. Try to get it as even as possible. For that extra golden, shiny finish, whisk together an egg with a tablespoon of milk in a small bowl. Brush this yumminess over the streusel topping. This little step really makes them look professionally done! Pop the pan into your preheated oven and bake for about 35 to 45 minutes. You’re looking for a topping that’s golden brown and bubbly filling peeking through. Once they’re out, the hardest part is waiting! Let them cool completely in the pan on a wire rack before cutting into squares. Patience will be rewarded, I promise!

Tips for Perfect Blueberry Pie Bars

Alright, let’s chat about getting these Blueberry Pie Bars just right every single time! The secret to that amazing crumbly topping really is using super cold butter; it makes all the difference for that perfect texture. And if you’re using frozen blueberries, which I totally do sometimes because they’re just easier, don’t thaw them out first! Just mix them up with the sugar and cornstarch, and you might need to bake them a little bit longer.

Want an extra-crispy topping? Try this little trick: just bake the streusel part by itself for about 10 minutes before you add it to the bars. It sounds a little extra, but trust me, it gives it this fantastic crunch that’s just divine. These little tips will help make your blueberry pie bars absolutely perfect!

Make-Ahead and Freezing Instructions for Blueberry Pie Bars

These Blueberry Pie Bars are just fantastic for planning ahead! If you want to make them a day or two in advance, just let them cool completely, then cover the pan tightly with plastic wrap. They’ll stay perfectly delicious. Need to stash them even longer? No problem! Once they’re totally cool, wrap the whole pan (or individual bars) really well, first in plastic wrap and then in foil. They’ll keep happily in the freezer for up to 3 months. Just unwrap them and let them thaw on the counter for a bit – they’ll be ready to enjoy!

Serving and Storage of Your Blueberry Pie Bars

Once these Blueberry Pie Bars have cooled completely, they’re ready to be served! They’re honestly delicious at room temperature, but if you’re a fan of chilled desserts, a quick stint in the fridge can be really nice too, especially on a warm day. To keep them fresh, just pop them back into their container or wrap them up airtight. They’ll stay wonderfully tasty for about 3-4 days when stored on the counter, or even longer if you pop them in the fridge!

Common Questions About Blueberry Pie Bars

Got questions? I’ve got answers! These Blueberry Pie Bars are pretty forgiving, but a few little tips can make all the difference. If you don’t have fresh blueberries, frozen ones work like a charm – just don’t thaw them first! You might need to bake them a touch longer, but that thick, gorgeous filling is worth it.

Can I use fresh blueberries instead of frozen?

Oh, absolutely! Fresh blueberries are wonderful here, especially when they’re in season. Treat them just like you would the frozen ones after mixing with the sugar and cornstarch, and they’ll bake up beautifully. Just be aware you might need slightly less baking time, so keep an eye on that golden-brown topping!

How do I prevent the bottom crust from being soggy?

A soggy bottom is the worst, I know! The key is making sure your butter is really cold when you make the crumble, and pressing that base crust firmly into the pan. Baking the streusel topping for about 10 minutes before adding the filling and then the rest of the topping can also create a little barrier. That, and letting them cool *completely* before cutting really do the trick.

What can I substitute for oats in this blueberry bars recipe?

If you’re not a fan of oats or just don’t have them, no worries! You can totally swap them out. Just use an equal amount of all-purpose flour instead. It’ll still give you a lovely tender crumble, though it won’t have that slightly chewier texture the oats bring. Almond flour can work too, but it might make the crumble a bit more delicate.

Nutritional Estimate for Blueberry Pie Bars

These Blueberry Pie Bars are a delicious treat, and while every kitchen and every batch can vary a bit, here’s a general idea of what you’re looking at for one yummy bar: around 280 calories, about 25g of sugar, and 12g of total fat. You’ll also get roughly 45g of carbohydrates and 3g of fiber. Remember, these are just estimates, so your mileage may vary!

Share Your Blueberry Pie Bars Experience

I’d absolutely love to hear how your Blueberry Pie Bars turned out! Did they disappear as fast as mine do? Drop a comment below with your thoughts, any fun twists you tried, or even just to say hello. Sharing your baking adventures is what makes this community so special!

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Blueberry Pie Bars

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Enjoy these easy blueberry pie bars with a streusel topping, perfect for a handheld dessert.

  • Author: Cat
  • Prep Time: 20 min
  • Cook Time: 40 min
  • Total Time: 60 min
  • Yield: 12 bars 1x
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Ingredients

Scale
  • 1 cup all-purpose flour
  • 1/2 cup rolled oats
  • 1/2 cup packed brown sugar
  • 1/4 teaspoon salt
  • 1/2 cup cold unsalted butter, cut into cubes
  • 1 1/2 pounds fresh or frozen blueberries
  • 1/4 cup granulated sugar
  • 2 tablespoons cornstarch
  • 1 tablespoon lemon juice
  • 1 teaspoon lemon zest
  • 1/4 teaspoon ground cinnamon
  • 1/4 teaspoon ground nutmeg
  • 1 large egg, beaten
  • 1 tablespoon milk

Instructions

  1. Preheat your oven to 375°F (190°C). Line an 8×8 inch baking pan with parchment paper, leaving an overhang on the sides.
  2. In a medium bowl, combine flour, oats, brown sugar, and salt. Cut in the cold butter using a pastry blender or your fingertips until the mixture resembles coarse crumbs.
  3. Press two-thirds of the crumb mixture evenly into the bottom of the prepared pan.
  4. In a separate bowl, gently toss blueberries with granulated sugar, cornstarch, lemon juice, lemon zest, cinnamon, and nutmeg.
  5. Pour the blueberry mixture over the pressed crust.
  6. Crumble the remaining one-third of the streusel mixture evenly over the blueberries.
  7. In a small bowl, whisk together the egg and milk. Brush this egg wash over the streusel topping.
  8. Bake for 35-45 minutes, or until the topping is golden brown and the blueberry filling is bubbly.
  9. Let the bars cool completely in the pan on a wire rack before cutting into squares.

Notes

  • For a crispier topping, you can bake the streusel mixture separately for about 10 minutes before adding it to the bars.
  • These bars can be frozen for up to 3 months. Wrap them tightly in plastic wrap and then in foil. Thaw at room temperature.
  • If using frozen blueberries, do not thaw them before mixing with the sugar and cornstarch. You may need to add a few extra minutes to the baking time.

Nutrition

  • Serving Size: 1 bar
  • Calories: 280
  • Sugar: 25g
  • Sodium: 50mg
  • Fat: 12g
  • Saturated Fat: 7g
  • Unsaturated Fat: 5g
  • Trans Fat: 0g
  • Carbohydrates: 45g
  • Fiber: 3g
  • Protein: 3g
  • Cholesterol: 30mg

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Catherine Valdès is the creator, recipe developer, and food photographer behind Unfold Recipes. With a rich heritage blending Spanish traditions and Californian sensibilities, she believes that every meal has a story. After leaving a successful career in public relations to pursue her passion, Catherine honed her skills in a professional culinary arts program. Her focus is on creating approachable yet elegant recipes that inspire confidence in the kitchen. She combines her expertise in recipe development with a love for wine pairing and effortless entertaining, showing her audience how to create beautiful, delicious meals to share with loved ones.

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