Blueberry Crumble Pie is the recipe I make when I want blueberry pie and a crisp topping in the same slice. A single crust holds lemony blueberry filling under a brown sugar cinnamon oat crumble.
I have made enough batches to know where it can go wrong: cutting before the full 3-hour cool turns the filling into blueberry soup. I keep that in mind from the first bowl to the final serving.
Why I keep coming back to this
- One bottom crust is simpler than a double crust.
- Flour and cornstarch thicken the berry filling.
- Lemon keeps the blueberries bright.
- The crumble adds buttery oat crunch.
- It uses familiar ingredients without asking for restaurant equipment.
- The leftovers are useful, which is one of my favorite tests for a recipe.
What you need (and what each one is doing)
- homemade pie crust (recipe makes 2 crusts; use 1).
- 5 1/2 cups blueberries (about 780g).I keep the berries cold or dry so their juice does not take over before the recipe is ready.
- 1/2 cup granulated sugar (100g).
- 1/3 cup all-purpose flour (41g).
- 1 Tablespoon cornstarch.
- 1 Tablespoon lemon juice.
- 1 teaspoon lemon zest.
- 1/2 cup packed light or dark brown sugar (100g).
- 6 Tablespoons all-purpose flour (46g; for crumble).
- 1/2 teaspoon ground cinnamon.
- 5 Tablespoons cold unsalted butter, cubed (71g).It carries flavor and helps the texture feel rounded rather than dry.
- 1/2 cup old-fashioned oats (40g).It gives chew and makes the recipe feel sturdy enough to keep for later.
How I make it
Step 1 — Prep
Prepare pie crust through chilling, roll one disc to 12 inches, and fit into a 9-inch pie dish.
Step 2 — Mix
Mix blueberries, granulated sugar, flour, cornstarch, lemon juice, and zest; refrigerate.
Step 3 — Add
Preheat oven to 400°F (204°C). Fill crust, discarding excess juices.
Step 4 — Shape
Mix brown sugar, flour, and cinnamon; cut in cold butter, stir in oats, and sprinkle over pie.
Step 5 — Bake or chill
Bake on a sheet pan for 25 minutes, reduce to 375°F (190°C), and bake 30-35 minutes more.
Step 6 — Finish
Cool at room temperature for 3 full hours before serving.
What I watch for
The filling should be bubbling before I trust that the thickeners have activated. This is the point where I slow down and use my eyes instead of cooking on autopilot.
The pie must cool until the filling has time to settle into sliceable pieces. I would rather make a small adjustment here than try to fix a finished recipe later.
Tips from my kitchen
- Use a sheet pan.It catches blueberry drips.
- Shield the crust.Cover edges once they brown.
- Cool fully.Three hours is what makes clean slices possible.
- Leave extra juices behind.Do not pour a puddle from the bowl into the crust.
Variations I have actually tried
- Blueberry peach:replace some berries with peaches.
- Almond crumble:add sliced almonds.
- Extra lemon:add more zest.
- Spiced:add a pinch of nutmeg.
- Mini pies:divide into small dishes and bake until bubbling.
Storing and reheating
Cover leftovers tightly and refrigerate for up to 5 days.
Reheat slices at 325°F (163°C) for 10-12 minutes; the oven keeps the crumble nicer than the microwave.
What I serve with it
I serve it with vanilla ice cream, unsweetened whipped cream, or Greek yogurt for breakfast leftovers.
Frequently asked questions
Can I use frozen blueberries?
Yes. Do not thaw first, and watch for bubbling in the center.
Why is it runny?
It may have been sliced warm, underbaked, or filled with too much loose juice.
Can I use store-bought crust?
Yes. Use a deep 9-inch crust and still bake on a sheet pan.
How do I keep crumble from burning?
Tent loosely with foil if it browns too quickly.
Can I make it ahead?
Yes. Bake the day before, cool fully, refrigerate, and bring slices closer to room temperature before serving.
If you wait the full cooling time, the first clean slice is worth it.
I start checking the pie after the temperature drops to 375°F (190°C). What I want to see is slow bubbling near the center, not just around the edges. That tells me the filling has gotten hot enough for the flour and cornstarch to do their job.
The crumble will soften after refrigeration, but I do not mind. A warm slice in the oven brings back some texture, and the blueberry filling is usually even better the next day.
If my blueberries are very sweet, I do not add extra sugar. If they are tart, I still keep the listed sugar and let vanilla ice cream handle the sweetness at serving.
That patient cooling time is part of the recipe, not a serving suggestion.
Blueberry Crumble Pie
Description
A blueberry crumble pie with one flaky crust, lemony blueberry filling, and a brown sugar cinnamon oat crumble topping.
Ingredients You’ll Need
Instructions
- Prepare pie crust through chilling, roll one disc to 12 inches, and fit into a 9-inch pie dish.
- Mix blueberries, granulated sugar, flour, cornstarch, lemon juice, and zest; refrigerate.
- Preheat oven to 400°F (204°C). Fill crust, discarding excess juices.
- Mix brown sugar, flour, and cinnamon; cut in cold butter, stir in oats, and sprinkle over pie.
- Bake on a sheet pan for 25 minutes, reduce to 375°F (190°C), and bake 30-35 minutes more.
- Cool at room temperature for 3 full hours before serving.
Nutrition Facts
Servings 8
- Amount Per Serving
- Calories 130kcal
- % Daily Value *
- Sodium 1mg1%
- Potassium 87mg3%
- Total Carbohydrate 32g11%
- Dietary Fiber 3g12%
- Sugars 23g
- Protein 1g2%
- Calcium 10 mg
- Iron 0.6 mg
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.
Note
Use a sheet pan. It catches blueberry drips.
Shield the crust. Cover edges once they brown.
Cool fully. Three hours is what makes clean slices possible.
Leave extra juices behind. Do not pour a puddle from the bowl into the crust.
Frequently Asked Questions
Yes. Do not thaw first, and watch for bubbling in the center.
It may have been sliced warm, underbaked, or filled with too much loose juice.
Yes. Use a deep 9-inch crust and still bake on a sheet pan.
Tent loosely with foil if it browns too quickly.
Yes. Bake the day before, cool fully, refrigerate, and bring slices closer to room temperature before serving.
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