Blueberry Crumb / Crumble Pie

Blueberry Crumb / Crumble Pie
⏱️ cook time 1 hour 10 minutes
🍽️ servings 8
⚡ Difficulty easy

intro

Juicy, jammy blueberry filling tucked under buttery cinnamon crumble, baked in a flaky crust for a cozy, crowd-pleasing summer sweet treat.

Ingredients

Fresh blueberries 6 cups (900g, rinsed and thoroughly patted dry)
Unbaked 9-inch pie crust 1 crust (225g, homemade or store-bought)
Cold unsalted butter (for crumb topping) 1/2 cup (113g, cut into 1cm cubes)
All-purpose flour (for crumb topping) 1 cup (120g)
Packed light brown sugar (for crumb topping) 2/3 cup (135g)
Ground cinnamon 1 teaspoon (2.6g)
Granulated sugar (for filling) 1/2 cup (100g)
Cornstarch (for filling) 3 tablespoons (24g)
Fresh lemon juice 2 tablespoons (30ml)
Fresh lemon zest 1 teaspoon (2g, from 1 medium lemon)
Fine table salt 1/4 teaspoon (1.5g, split between topping and filling)

Steps

1

Prepare the Oven and Crust

Preheat your oven to 375°F (190°C) and adjust the oven rack to the middle position. Unroll the 9-inch unbaked pie crust and press it firmly into a 9-inch (23cm) glass pie dish, crimping the top edges decoratively as desired. Prick the bottom of the crust 8–10 times with a fork to prevent air bubbles from forming during baking.

Step 1
step1:Prepare the Oven and Crust
2

Make the Crumb Topping

Make the crumb topping: in a medium mixing bowl, combine 1 cup (120g) all-purpose flour, 2/3 cup (135g) packed light brown sugar, 1 teaspoon (2.6g) ground cinnamon, and 1/8 teaspoon (0.75g) fine salt. Add the cold 1/2 cup (113g) cubed butter, and use your fingertips to rub the butter into the dry ingredients until the mixture forms coarse, pea-sized clumps. Place the bowl of crumbs in the refrigerator to chill while you prepare the filling.

Step 2
step2:Make the Crumb Topping
3

Make the Blueberry Filling

Make the blueberry filling: in a large mixing bowl, gently toss the 6 cups (900g) rinsed, thoroughly patted-dry blueberries with 1/2 cup (100g) granulated sugar, 3 tablespoons (24g) cornstarch, 2 tablespoons (30ml) lemon juice, 1 teaspoon (2g) lemon zest, and the remaining 1/8 teaspoon (0.75g) salt. Stir slowly until every blueberry is evenly coated in the sugar-starch mixture, taking care not to mash the delicate berries.

Step 3
step3:Make the Blueberry Filling
4

Assemble the Pie

Assemble the pie: pour the coated blueberry filling evenly into the prepared pie crust, spreading it into a smooth, even layer with the back of a spoon. Retrieve the chilled crumb topping from the refrigerator, and sprinkle it loosely and evenly over the top of the blueberries, covering all exposed fruit. Do not press the crumbs down firmly, as this will create a dense, hard topping.

Step 4
step4:Assemble the Pie
5

Bake the Pie

Bake the pie: set the assembled pie on a rimmed baking sheet (to catch any bubbling fruit juice that may spill over) and place it on the middle oven rack. Bake for 50–55 minutes, until the crumb topping is deep golden brown and the blueberry filling is visibly bubbling thickly through cracks in the crumb layer. If the crimped crust edges begin to darken too quickly after 30 minutes of baking, wrap them in a thin strip of aluminum foil to prevent burning.

Step 5
step5:Bake the Pie
6

Cool the Pie Completely

Remove the baked pie from the oven and transfer it to a wire cooling rack. Let it cool completely for a full 2 hours at room temperature to allow the filling to set fully before slicing. Serve slices at room temperature or slightly warmed, paired with a scoop of vanilla ice cream if desired.

Step 6
step6:Cool the Pie Completely

Tips

1.Always use fully cold butter for the crumb topping: warm butter melts too quickly in the oven, leading to a soggy, dense topping instead of light, crisp crumbs.
2.Do not skip the full 2-hour cooling time: cutting the pie while it is still warm will cause the runny, unset filling to spill out of the crust and create messy slices.
3.If using frozen blueberries, do not thaw them before mixing into the filling; add 1 extra tablespoon (8g) of cornstarch to absorb extra juice released as the berries bake.

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Blueberry Crumb / Crumble Pie:Frequently Asked Questions

1.Can I use frozen blueberries instead of fresh for this pie?
Absolutely! You can swap fresh blueberries for frozen without issue, just skip thawing them first to avoid excess purple juice bleeding into your crust, and toss them with 1 extra tablespoon of cornstarch to thicken extra released moisture. Add 10 to 12 minutes to total bake time, and keep a pie shield handy to prevent crust edges from over-browning.
2.Why is my blueberry filling runny after baking?
Runny filling usually stems from three easy-to-fix missteps: skimping on thickener, slicing into the pie too early before it sets, or using extra-juicy overripe berries without a starch adjustment. Always let your baked pie cool a full 4 hours (or chill overnight) to let pectin and thickener fully set for clean, hold-together slices.
3.Do I need to blind bake the pie crust for this crumb pie?
I recommend a partial blind bake for your unbaked 9-inch pie crust for the best results! Line it with parchment, fill with pie weights or dried beans, and bake at 375°F for 10 minutes. This prevents the bottom crust from getting soggy under the heavy, juicy blueberry filling and buttery crumb, so you get that perfect flaky base every time.
4.Can I make the crumb topping ahead of time?
Definitely! Mix up the crumb topping with your cold unsalted butter, all-purpose flour, and packed light brown sugar, then store it in an airtight container in the fridge for up to 3 days, or freeze it for up to 3 months. There’s no need to thaw it before use—just crumble it straight over your blueberry filling right before popping the pie in the oven.
5.My crumb topping melted into the filling instead of staying crumbly—what went wrong?
This almost always happens if your cold unsalted butter was too warm when you mixed the crumb topping, or if you over-mixed the topping into a smooth paste instead of leaving coarse, pea-sized clumps. Always use ice-cold cubed butter, and work it into the flour and brown sugar just until uneven, lumpy crumbs form for that perfect textured top.
6.What’s the best way to keep pie crust edges from burning while baking?
Grab a silicone pie shield or a DIY foil ring to wrap around the thin crust edges for the first 35 minutes of baking. Remove the shield for the last 10 to 15 minutes to let edges turn a perfect golden brown, without the risk of them charring before the filling and crumb topping are fully cooked through.
7.Can I use a store-bought pie crust instead of homemade for this recipe?
100%—a good quality store-bought refrigerated unbaked 9-inch pie crust works perfectly here if you’re short on time. Just make sure to press it firmly into your pie plate, crimp edges as desired, and do the quick 10-minute partial blind bake to avoid a soggy bottom, just like you would with a homemade crust.
8.How should I store leftover blueberry crumb pie?
Cover leftover pie loosely with plastic wrap or foil and store it in the fridge for up to 4 days. You can serve slices cold straight from the fridge, or warm individual slices for 15 seconds in the microwave or 5 minutes in a 350°F oven to bring back that buttery, just-baked flavor and texture.
9.Can I add other berries to the blueberry filling?
Absolutely! This recipe is super flexible. Swap up to 1 cup of blueberries for fresh raspberries, blackberries, or chopped strawberries for a mixed summer berry crumb pie. Keep total fruit volume at 6 cups, and add a tiny extra pinch of cornstarch if using extra-juicy raspberries to avoid runny filling.
10.Why does my crumb topping get soggy instead of crisp?
Soggy crumb topping usually happens if your oven temperature is too low, or if you’ve piled the flour, butter, and brown sugar crumb mix on too thick in spots that trap steam from cooking berries. Make sure your oven is fully preheated before baking, and scatter crumbs in an even, loose layer over filling instead of pressing them down firmly.
11.Do I need to add lemon to the blueberry filling?
It’s not strictly required, but I highly recommend stirring in 1 teaspoon of fresh lemon zest and 1 tablespoon of fresh lemon juice to your blueberry filling! The bright, tart citrus cuts through sweet brown sugar crumble and rich buttery crust, making sweet blueberry flavor pop instead of tasting flat or one-note.
12.Can I freeze this whole baked pie for later?
Yes! Let the fully baked pie cool completely to room temperature, then wrap it tightly in two layers of plastic wrap and one layer of aluminum foil, and freeze for up to 3 months. Thaw it overnight in the fridge, then warm it in a 350°F oven for 15 minutes to crisp the crumb topping back up before serving.
13.What kind of thickener works best for the blueberry filling?
I prefer instant tapioca or cornstarch for this filling, as both set clear without making fruit taste starchy or cloudy. Use ¼ cup of cornstarch, or ⅓ cup of instant tapioca, for 6 cups of blueberries. Skip all-purpose flour as a thickener here—it can leave a pasty, dull texture in the bright berry filling.
14.How do I know when the pie is done baking?
Your pie is fully done when the crumb topping is a deep golden brown, the blueberry filling is actively bubbling up through cracks in the crumb topping (not just around the edges), and filling temperature hits 200°F on an instant-read thermometer. That bubbling means the thickener is fully activated to set the filling.
15.Can I make this pie gluten-free?
Absolutely! Swap the all-purpose flour in the crumb topping for a 1:1 gluten-free all-purpose baking blend (look for one with xanthan gum for best texture), and use a certified gluten-free unbaked 9-inch pie crust. All other ingredients work as-is, and you’ll get the same buttery, juicy, crumbly result no one will guess is gluten-free.

Comments (3)

2 days ago

OMG this blueberry crumb pie was SUCH a hit at our neighborhood potluck last weekend! I was worried the crumb topping would get soggy but it stayed perfectly crisp, and the blueberry filling wasn’t too runny at all. My picky 7 year old asked for a second slice before everyone even got through the first round. SO good, will be making this all summer long for cookouts!

1 week ago

Super easy recipe for a total beginner like me! I was worried I’d mess it up since I’m still learning to bake, but the steps were so straightforward. I used frozen blueberries straight from the bag without draining them first, so the filling was a little juicier than the photos looked. Still tasted amazing though, my roommate ate half the pie in one sitting. Would definitely make again, just remember to thaw and drain my berries next time!

3 days ago

So glad you enjoyed the pie even with the frozen blueberry swap! Great call noting to thaw and drain frozen berries first — that’s such a common gotcha for new bakers, so we’ll add that quick tip to the recipe card soon. Next time you can also toss in an extra teaspoon of cornstarch with frozen berries to help the filling set perfectly! 😊

5 days ago

Total game changer of a blueberry pie recipe! I’ve tried so many crumb pie recipes over the years that either have a cloyingly sweet topping or a tart filling that’s totally out of balance, but this one hits exactly the right note. I brought it to my family’s Sunday dinner and even my grandma who swears by her 1950s handwritten blueberry pie recipe asked me for the link! Cook time was right at 1 hour 10 minutes like the recipe said too, no random extra time needed, which I loved.

2 days ago

Wait did you use fresh or frozen blueberries for this? I’ve got a giant bag of frozen wild blueberries I picked up on sale last week and I’m dying to make this for our Fourth of July cookout!

yesterday

Great question! Fresh blueberries work perfectly as written, but if you’re using frozen (wild blueberries are such a tasty swap!) just thaw them fully, drain off all excess juice, and add 1 extra teaspoon of cornstarch to the filling mix to keep it from getting too runny. Hope it’s a total hit at your cookout!