Triple Berry Crumble With Oats – Easy Berry Dessert

Triple Berry Crumble With Oats is a warm, comforting dessert filled with juicy berries beneath a golden, buttery oat topping. As the berries bake with lemon and cornstarch, they become deliciously soft and jammy while the crumble turns crisp around the edges.

This easy berry crumble works beautifully with fresh or frozen berries, so it is a dessert you can enjoy throughout the year. Serve it warm on its own or add a scoop of vanilla ice cream for a classic finish.

Why You’ll Love This Recipe

This mixed berry crumble delivers a wonderful contrast between juicy fruit and crisp, buttery topping. Cinnamon adds warmth to the oats, while lemon juice brightens the berries and balances their natural sweetness.

The preparation is also refreshingly simple. The berry filling is mixed directly in the baking dish, and the oat crumble topping requires only basic pantry ingredients.

You can use your favorite combination of berries, making the recipe flexible and family-friendly. Strawberries, blueberries, raspberries, and blackberries are all delicious options.

Ingredients

Oat Crumble Topping

• 2/3 cup all-purpose flour
• 2/3 cup rolled oats
• 3/4 cup sugar
• 1/2–1 teaspoon ground cinnamon
• 1/2 teaspoon salt
• 1/2 cup cold butter, cubed

Triple Berry Filling

• 3–4 cups mixed berries, fresh or frozen, about 1 pound
• 1 tablespoon cornstarch
• 1 tablespoon lemon juice
• Pinch of salt
• Butter, for greasing the baking dish

Instructions

1. Preheat the oven to 375°F (190°C). Lightly grease the bottom of a 9×13-inch casserole or ceramic baking dish with butter.
2. Add the flour, rolled oats, sugar, cinnamon, and salt to a mixing bowl. Whisk until evenly combined and free of lumps.
3. Add the cold cubed butter. Rub the butter into the dry ingredients with your fingertips until the mixture resembles large, coarse breadcrumbs with some crumbly pieces remaining.
4. Add the mixed berries directly to the prepared baking dish. If using particularly large berries, roughly chop them first if desired.
5. Add the cornstarch, lemon juice, and a pinch of salt to the berries. Gently toss until the fruit is evenly coated.
6. Scatter the oat mixture evenly over the berries, covering the fruit without pressing the topping down firmly.
7. Bake the Triple Berry Crumble With Oats for 40–45 minutes, or until the fruit is bubbling and the oat crumble topping is crisp and golden brown.
8. Remove from the oven and allow the crumble to rest briefly before serving.
9. Serve warm on its own or with vanilla ice cream or cold whipped cream.

Tips & Tricks

Keep the butter cold until you are ready to prepare the oat crumble topping. Cold butter helps create distinct crumbs rather than a soft, uniform mixture.

Do not overwork the topping. Stop mixing when you have a combination of fine crumbs and larger buttery clusters, which will create more texture after baking.

Fresh and frozen berries can both be used. If baking with frozen berries, there is generally no need to thaw them first. The filling may simply need a little extra time to become hot and bubbly.

Try a combination of strawberries, raspberries, and blueberries for a colorful triple berry crisp. Blackberries can replace any of these berries if you prefer.

If the crumble topping starts browning too quickly before the fruit is bubbling, loosely cover the baking dish with foil for the remaining baking time.

Allow the baked crumble to rest for about 10–15 minutes before serving. This gives the hot berry juices a little time to thicken.

Details

Prep Time: 15 minutes
Cook Time: 40–45 minutes
Resting Time: 10 minutes
Total Time: About 1 hour 10 minutes
Yield: Approximately 8 servings
Category: Dessert
Method: Baking
Cuisine: American-Inspired
Difficulty: Easy
Dietary Notes: Vegetarian; halal-friendly when prepared with suitable ingredients

Notes

You can use one berry variety or any combination of your favorites. Strawberries, blueberries, raspberries, and blackberries all work well.

Frozen berries make this an easy berry crumble to prepare outside peak berry season. Since frozen fruit can release more liquid during baking, make sure the filling is bubbling before removing the dish from the oven.

For serving, vanilla ice cream creates a delicious contrast between warm fruit and cold, creamy ice cream. Whipped cream is another simple option.

If you prefer more cinnamon flavor, use the full teaspoon in the crumble topping.

Nutrition

Approximate nutrition per serving, without ice cream or whipped cream:

Calories: 300–350 kcal
Protein: 3–5 g
Carbohydrates: 45–55 g
Fat: 12–15 g

Nutrition values are estimates and will vary depending on the berries, butter, sugar, and serving size.

FAQ

What berries are best for Triple Berry Crumble With Oats?

Strawberries, blueberries, raspberries, and blackberries all work well. A combination of three berries provides different flavors, colors, and textures, but you can use whatever mixture you have available.

Can I make mixed berry crumble with frozen berries?

Yes. Fresh or frozen berries can be used in this recipe. Frozen berries are especially convenient because they allow you to prepare berry crumble throughout the year.

Do I need to thaw frozen berries before making berry crumble?

You can add frozen berries directly to the baking dish. Because frozen fruit may release additional moisture and take longer to heat, make sure the filling is bubbling and the topping is golden before removing the crumble from the oven.

Why do you add cornstarch to berry crumble?

Cornstarch helps thicken the juices released by the berries during baking. This creates a pleasantly jammy fruit filling rather than an overly runny sauce.

How do I make a crispy oat crumble topping?

Use cold cubed butter and rub it into the flour, oats, sugar, cinnamon, and salt until coarse crumbs form. Avoid overworking or compacting the topping when spreading it over the berries.

What can I serve with triple berry crumble?

Warm berry crumble pairs especially well with vanilla ice cream or chilled whipped cream. It can also be served on its own when you want a simpler fruit dessert.

Storage

Store leftover Triple Berry Crumble With Oats in an airtight container or cover the baking dish tightly and refrigerate for up to 3–4 days.

For longer storage, freeze individual portions in freezer-safe containers for up to 2–3 months. Thaw overnight in the refrigerator before reheating.

For the best topping texture, reheat the crumble in a 350°F (175°C) oven until warmed through. The microwave also works for individual servings, although the topping will become softer.

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Triple Berry Crumble With Oats – Easy Berry Dessert

Triple Berry Crumble With Oats is made with mixed berries topped with a buttery cinnamon oat crumble. Toss the berries with cornstarch and lemon, add the oat topping, and bake at 375°F for 40–45 minutes. Serve warm with vanilla ice cream or whipped cream.

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Course Dessert

Cuisine American-inspired

Ingredients

  

• Oat Crumble Topping
• 2/3 cup all-purpose flour
• 2/3 cup rolled oats
• 3/4 cup sugar
• 1/2 –1 teaspoon ground cinnamon
• 1/2 teaspoon salt
• 1/2 cup cold butter cubed
• Triple Berry Filling
• 3 –4 cups mixed berries fresh or frozen, about 1 pound
• 1 tablespoon cornstarch
• 1 tablespoon lemon juice
• Pinch of salt
• Butter for greasing the baking dish

Instructions

 

• Preheat the oven to 375°F (190°C). Lightly grease the bottom of a 9×13-inch casserole or ceramic baking dish with butter.
• Add the flour, rolled oats, sugar, cinnamon, and salt to a mixing bowl. Whisk until evenly combined and free of lumps.
• Add the cold cubed butter. Rub the butter into the dry ingredients with your fingertips until the mixture resembles large, coarse breadcrumbs with some crumbly pieces remaining.
• Add the mixed berries directly to the prepared baking dish. If using particularly large berries, roughly chop them first if desired.
• Add the cornstarch, lemon juice, and a pinch of salt to the berries. Gently toss until the fruit is evenly coated.
• Scatter the oat mixture evenly over the berries, covering the fruit without pressing the topping down firmly.
• Bake the Triple Berry Crumble With Oats for 40–45 minutes, or until the fruit is bubbling and the oat crumble topping is crisp and golden brown.
• Remove from the oven and allow the crumble to rest briefly before serving.
• Serve warm on its own or with vanilla ice cream or cold whipped cream.

Notes

You can use one berry variety or any combination of your favorites. Strawberries, blueberries, raspberries, and blackberries all work well.

Frozen berries make this an easy berry crumble to prepare outside peak berry season. Since frozen fruit can release more liquid during baking, make sure the filling is bubbling before removing the dish from the oven.

For serving, vanilla ice cream creates a delicious contrast between warm fruit and cold, creamy ice cream. Whipped cream is another simple option.

Conclusion

This Triple Berry Crumble With Oats is an easy way to transform fresh or frozen berries into a warm, comforting dessert. The bubbling fruit filling is bright and juicy, while the cinnamon oat topping becomes buttery, crisp, and beautifully golden in the oven.

With straightforward ingredients and very little preparation, this berry crumble with oats is perfect for family desserts, casual gatherings, or simply using up a supply of berries. Serve it warm with vanilla ice cream for an especially satisfying combination.