Name: Blueberry Crumble With Oats Recipe
Prep time: 10 min
Cook time: 40 min
Total time: 50 min
Cuisine: American
Ingredients: 4 cups fresh blueberries, washed and dried (about 650 g); 2 tbsp cornstarch; 1 tbsp lemon juice; Small pinch of salt; 2/3 cup flour (86 g); 2/3 cup old-fashioned rolled oats (80 g); 1/2 cup granulated sugar (100 g); 1/2 tsp cinnamon, optional; 1/2 tsp salt; 1/2 cup unsalted butter, melted (113 g)

Why You’ll Love Blueberry Crumble With Oats Recipe

This crumble is incredibly easy to make with simple pantry ingredients and no complicated steps.

The buttery oat topping becomes crisp and golden while the blueberries turn soft, sweet, and jammy.

Using melted butter means there is no need for cutting cold butter into the crumble mixture, making preparation much faster.

It is delicious served warm on its own or paired with vanilla ice cream or whipped cream.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

For the blueberry filling:

4 cups fresh blueberries, washed and dried
2 tbsp cornstarch
1 tbsp lemon juice
Small pinch of salt

For the crumble topping:

2/3 cup flour
2/3 cup old-fashioned rolled oats
1/2 cup granulated sugar
1/2 tsp cinnamon, optional
1/2 tsp salt
1/2 cup unsalted butter, melted

Directions

Preheat the oven to 375°F and lightly grease a 9-inch pie dish with butter.

Add the blueberries, cornstarch, lemon juice, and a small pinch of salt directly into the pie dish. Toss everything together until evenly coated.

In a separate bowl, combine the flour, rolled oats, sugar, cinnamon, salt, and melted butter. Stir gently with a spoon until the mixture forms soft crumbs. Avoid overmixing.

Sprinkle the crumble topping over the blueberries using your fingers, creating uneven chunks and leaving a few blueberries visible for extra texture and crispness.

Bake for 40 to 45 minutes, or until the topping is golden brown and crispy and the blueberry filling is bubbling around the edges.

Allow the crumble to cool slightly before serving. Serve warm on its own, with vanilla ice cream, or with whipped cream.

Servings and timing

Servings: 8
Prep time: 10 minutes
Bake time: 40–45 minutes
Total time: 50–55 minutes

Variations

Swap blueberries with raspberries, blackberries, or mixed berries for a different flavor combination.

Use frozen blueberries if needed. There is no need to thaw them first, but the baking time may increase slightly.

Add chopped pecans or walnuts to the crumble topping for extra crunch.

Mix a little brown sugar into the topping for a deeper caramel-like flavor.

Add a pinch of nutmeg along with the cinnamon for extra warmth.

Storage/Reheating

Store leftover blueberry crumble covered in the refrigerator for up to 4 days.

To reheat, warm portions in the microwave for about 30 seconds or place the crumble in a 350°F oven for 10–15 minutes until heated through and crispy again.

The crumble can also be frozen for up to 2 months. Thaw overnight in the refrigerator before reheating.

FAQs

Can I use frozen blueberries?

Yes. Frozen blueberries work very well in this recipe. Use them straight from the freezer without thawing.

Why is my crumble topping not crispy?

Overmixing the topping can make it dense instead of crumbly. Keeping the topping uneven also helps create crispy texture.

Can I make this crumble ahead of time?

Yes. You can assemble the crumble ahead of time and refrigerate it before baking.

What type of oats should I use?

Old-fashioned rolled oats work best because they provide a hearty texture and crisp topping.

Can I reduce the sugar?

Yes. You can slightly reduce the sugar if your blueberries are naturally sweet.

How do I know when the crumble is done?

The topping should be golden brown and the blueberry filling should be bubbling around the edges.

Can I make this gluten-free?

Yes. Use a gluten-free flour blend and certified gluten-free oats.

What should I serve with blueberry crumble?

Vanilla ice cream, whipped cream, or even plain yogurt pair wonderfully with this dessert.

Can I use other fruits?

Absolutely. This recipe works well with peaches, apples, strawberries, or mixed berries.

Why add lemon juice to the filling?

Lemon juice brightens the blueberry flavor and balances the sweetness.

Conclusion

This Blueberry Crumble With Oats is a warm, comforting dessert that is easy to prepare and full of fresh berry flavor. With its crisp buttery topping and juicy blueberry filling, it is the perfect dessert for casual family dinners, summer gatherings, or whenever you want a simple homemade treat.