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If you’re craving a tasty treat that’s both simple and satisfying, look no further than a blueberry rustic crumble with oats. This delightful dessert combines juicy blueberries and crispy oats for a dessert that’s as pleasing to the palate as it is easy to prepare. Whether you’re a seasoned baker or a kitchen newbie, this guide provides step-by-step instructions to perfect this delicious dish. Here’s how to master the art of making a blueberry rustic crumble with oats.
Supplies Needed for Blueberry Rustic Crumble Recipe with Oats

Make sure you have the following ingredients and tools on hand before you begin:
Ingredients:
– 2 cups fresh or frozen blueberries
– 1 tablespoon lemon juice
– 1/4 cup granulated sugar
– 1/2 cup all-purpose flour, divided
– 1/2 cup rolled oats
– 1/2 cup brown sugar, packed
– 1/4 cup unsalted butter, cold and cubed
– 1/4 teaspoon ground cinnamon
– A pinch of salt
Tools:
– Mixing bowls
– Measuring cups and spoons
– Baking dish (about 8×8 inches)
– Oven mitts
– Cooling rack
If you love this crumble, try our collection of blueberry for breakfast recipes.
Method 1: Baking the Blueberry Rustic Crumble Recipe with Oats

1. Preheat and Prep: Start by preheating your oven to 375°F (190°C). Grease your baking dish lightly with a bit of butter or non-stick spray.
2. Prepare the Blueberry Mixture: In a mixing bowl, combine the blueberries, lemon juice, 1/4 cup of sugar, and 1 tablespoon of flour. Stir gently until the blueberries are evenly coated. Transfer this mixture into the prepared baking dish.
3. Make the Crumble Topping: In another bowl, mix the remaining flour, oats, brown sugar, cinnamon, and salt. Add in the cold, cubed butter. Using a fork or a pastry cutter, blend until the mixture becomes crumbly. Sprinkle this topping evenly over the blueberry mixture.
4. Bake: Place the baking dish in the preheated oven. Bake for about 30-35 minutes, or until the topping turns golden brown and the blueberries are bubbly.
5. Cool and Serve: Remove the crumble from the oven using oven mitts. Let it cool on a rack for a few minutes before serving. Enjoy warm, perhaps with a scoop of vanilla ice cream or a dollop of whipped cream.

Baking this blueberry rustic crumble recipe with oats in the oven gives you a perfectly crisp topping and bubbling blueberry filling every time.
Method 2: Quick Microwave Method for Blueberry Rustic Crumble Recipe with Oats
If you’re short on time, this method is perfect as it allows you to enjoy a smaller serving of blueberry crumble quickly.

Ingredients (per serving):
– 1/2 cup blueberries
– 1 tablespoon sugar
– 1 tablespoon flour
– 2 tablespoons oats
– 1 tablespoon brown sugar
– 1 tablespoon butter
– Pinch of cinnamon
Instructions:
1. Microwave Safe Dish Prep: Use a microwave-safe mug or small bowl to mix blueberries, sugar, and flour.
2. Create Topping: In another small bowl, combine oats, brown sugar, and cinnamon. Cut in the butter until the mixture resembles coarse crumbs.
3. Assemble and Cook: Sprinkle the oat mixture evenly on top of the blueberries in the mug or bowl.
4. Microwave: Cook on high for 2-3 minutes, or until the blueberries are bubbly and the topping is golden.
5. Cool and Enjoy: Let the crumble cool slightly before diving in.
With this quick microwave version, you can still enjoy the same sweet flavors of a blueberry rustic crumble recipe with oats in just minutes.
Tips for Success:
– Oats Selection: Opt for rolled oats rather than instant oats for a better texture.
– Frozen Blueberries: If using frozen blueberries, it’s best not to thaw them to prevent excess juicing during baking.
– Customization: Consider adding nuts or coconut flakes to your crumble topping for an extra crunch.
Now you have two straightforward ways to make a blueberry rustic crumble with oats, ensuring you can enjoy this dessert regardless of time constraints or kitchen experience. Dive into the warm, inviting blend of berries and oats today!
Check out our full collection of easy homemade recipes.
Explore the top blueberry health benefits you should know.
Serving Suggestions
This blueberry rustic crumble recipe with oats is delicious on its own, but it truly shines when paired with the right accompaniments:
- With Ice Cream: A scoop of vanilla or cinnamon ice cream melting over the warm crumble makes this dessert irresistible.
- With Whipped Cream: Lightly sweetened whipped cream balances the tart blueberry flavors.
- With Yogurt: For a lighter twist, serve your crumble with Greek yogurt for breakfast or brunch.
- With Custard or Cream: A drizzle of custard or heavy cream adds extra indulgence.
- As a Breakfast Treat: This blueberry rustic crumble recipe with oats can also double as a sweet morning treat alongside coffee or tea.
No matter how you serve it, this crumble is a cozy, versatile dish that’s perfect for family gatherings, casual dinners, or holiday celebrations.tic crumble is a cozy, crowd-pleasing dessert perfect for any occasion.
Blueberry Rustic Crumble Recipe with Oats

This blueberry rustic crumble recipe with oats is a simple, comforting dessert made with juicy blueberries and a crunchy oat topping. Easy to prepare with basic ingredients, it’s perfect for breakfast, snacks, or a quick family dessert.
Type: Dessert
Cuisine: American
Keywords: blueberry rustic crumble recipe with oats, blueberry dessert, healthy blueberry crumble, easy oat crumble, fruit crumble recipe, summer dessert
Recipe Yield: 6 servings
Calories: 250
Preparation Time: PT10M
Cooking Time: PT30M
Total Time: PT40M
Recipe Ingredients:
- 2 cups fresh blueberries
- 1/2 cup rolled oats
- 1/3 cup brown sugar
- 1/4 cup all-purpose flour
- 1/4 cup unsalted butter (melted)
- 1 tsp cinnamon
- 1/2 tsp vanilla extract
- Pinch of salt
Recipe Instructions: 1. Preheat your oven to 375°F (190°C). 2. In a bowl, mix 4 cups of fresh blueberries with 1/4 cup sugar and 1 tablespoon lemon juice. Transfer to a baking dish. 3. In another bowl, combine 1 cup rolled oats, 1/2 cup flour, 1/2 cup brown sugar, 1/2 teaspoon cinnamon, and a pinch of salt. 4. Cut in 1/2 cup cold butter until mixture becomes crumbly. 5. Sprinkle the oat mixture evenly over the blueberries. 6. Bake for 35–40 minutes until the top is golden and the blueberries are bubbling. 7. Let it cool slightly and serve warm, optionally with a scoop of vanilla ice cream.
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