These Blueberry Oatmeal Crumble Bars are the perfect sweet treat for any occasion. Imagine a buttery, crumbly oatmeal crust and topping, generously layered with a sweet and tangy blueberry filling. They’re a delightful blend of textures and flavors that everyone will love.
These bars are the perfect balance of sweet, tart, and buttery, making them an irresistible dessert.
Recipe Details
- Flavor Profile: Sweet, tart, and buttery, with a delicious balance of flavors.
- Textures: Crumbly and tender oatmeal base with a juicy blueberry filling and a crunchy topping.
- Total Time: 1 hour 15 minutes.
- Difficulty: Easy, a great recipe for bakers of all levels.
What You’ll Need
These Blueberry Oatmeal Crumble Bars feature a simple combination of ingredients that come together to create a truly delicious dessert. You’ll need oats, flour, butter, sugar, and baking soda for the crumbly base/topping. Fresh or frozen blueberries are the star of the filling, with a touch of sugar and lemon juice to enhance their natural sweetness.
Ingredient Notes
- Rolled Oats – These are the heart of the crumble. Use old-fashioned rolled oats for the best texture in both the crust and topping.
- All-Purpose Flour – All-purpose flour provides structure to the crust and topping. Make sure to measure properly.
- Unsalted Butter – Adds richness and flavor to the crumble. Be sure to use cold butter, cut into small cubes.
- Granulated Sugar – Sweetens the bars and helps the crumble crisp up.
- Brown Sugar – Adds a touch of molasses flavor and helps with the chewy texture of the topping.
- Baking Soda – A leavening agent that helps the crumble rise slightly.
- Blueberries – Fresh or frozen blueberries work equally well. If using frozen, there’s no need to thaw them first.
- Lemon Juice – Enhances the blueberry flavor and adds a touch of brightness.
How to Make Blueberry Oatmeal Crumble Bars
Ingredients:
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Instructions:
- Prepare the Oven and Pan: Preheat your oven to 350°F and lightly grease a 9×13 inch baking dish. This will prevent the bars from sticking and make them easier to remove.
- Make the Oatmeal Crumble (Crust/Topping): In a large bowl, whisk together the rolled oats, all-purpose flour, both sugars, and baking soda. Now, add the cold, cubed butter to the dry ingredients. Use a pastry blender or your fingers to cut the butter into the dry ingredients until the mixture resembles coarse crumbs. This step is key to creating a perfect crumble.
- Create the Crust: Press about 2/3 of the oat mixture firmly into the bottom of the prepared baking dish. This forms the base of your bars.
- Prepare the Blueberry Filling: In a separate medium bowl, combine the blueberries, granulated sugar, and lemon juice. Gently toss to coat the blueberries.
- Assemble the Bars: Sprinkle the blueberry mixture evenly over the oat crust. Then, sprinkle the remaining oat crumble evenly over the blueberries.
- Bake: Bake in the preheated oven for 45-50 minutes, or until the top is golden brown and the filling is bubbly.
- Cooling is Key: Let the bars cool completely in the baking dish before cutting into squares. This allows the filling to set and the bars to firm up.
- Serve & Enjoy: Cut into squares and serve. These Blueberry Crumble Oatmeal Bars are delicious on their own or with a scoop of vanilla ice cream.
Pro Tip: Make sure your butter is cold when you cut it into the oat mixture. This helps create those wonderful crumbs that make the bars so delicious.
Recipe Tips
- For an even better flavor, you can toast the oats in the oven or in a skillet for a few minutes before adding them to the crumble mixture.
- If your blueberries are particularly tart, you can add a little bit more sugar to the filling.
- Allow the bars to cool completely before cutting for clean, neat slices.
- For easy removal, you can line the baking dish with parchment paper, leaving an overhang on the sides.
- Don’t overbake the bars. The top should be golden brown, and the filling should be bubbly.
FAQs
- Can I use frozen blueberries? Yes, frozen blueberries work great! There is no need to thaw them before using.
- Can I substitute other berries? Certainly! Raspberries, blackberries, or a mix of berries would be delicious.
- How do I store these bars? Store the bars in an airtight container at room temperature for up to 3 days, or in the refrigerator for up to a week.
- Can I make these bars ahead of time? Yes, you can make the bars a day or two in advance. Store them as instructed above.
Serving Suggestions
- Serve these Blueberry Oatmeal Crumble Bars warm with a scoop of vanilla ice cream for a classic dessert pairing.
- A dollop of whipped cream is another excellent addition.
- Enjoy with a cup of coffee or tea.
- These bars are also wonderful on their own for a casual treat.
Make This Recipe in Advance
You can make the crumble topping and crust ahead of time. Prepare the oat mixture, and store it in an airtight container in the refrigerator for up to 2 days. When ready to bake, assemble the bars as directed, and bake as usual. You can also assemble the entire dish and refrigerate it before baking, just add a few more minutes to the baking time.
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Blueberry Oatmeal Crumble Bars
- Total Time: 1 hour 15 minutes
- Yield: 8-inch square pan 1x
Description
These Blueberry Oatmeal Crumble Bars are the perfect sweet treat for any occasion. Imagine a buttery, crumbly oatmeal crust and topping, generously layered with a sweet and tangy blueberry filling.
Ingredients
Crust and Crumble Topping
½ cup unsalted butter, melted
1 cup all-purpose flour
¾ cup old-fashioned oats (don’t use quick cook or instant, they’re finer and behave like flour and will make mixture too dry)
½ cup granulated sugar
¼ cup light brown sugar, packed
pinch salt, optional and to taste
Blueberry Layer
12 ounces 2 cups blueberries (fresh or frozen)
⅓ cup granulated sugar
2 tablespoons lemon juice
2 teaspoons cornstarch
Instructions
Preheat the oven to 350F. Line an 8-inch square pan with foil, then spray with cooking spray.
Make the Crust and Crumble Topping. In a microwave-safe bowl, melt the butter. Add flour, oats, sugars, and salt. Mix. Reserve 1 heaping cup of this mixture for the topping. Press the remaining mixture into the prepared pan.
Make the Blueberry Layer. In a bowl, combine blueberries, sugar, lemon juice, and cornstarch. Toss together. Spread over the crust.
Sprinkle the reserved crumble topping over the blueberry layer.
Bake for about 55 minutes, or until set and golden. Let cool for at least 30 minutes before cutting and serving.
Notes
For an even better flavor, you can toast the oats in the oven or in a skillet for a few minutes before adding them to the crumble mixture.
If your blueberries are particularly tart, you can add a little bit more sugar to the filling.
Allow the bars to cool completely before cutting for clean, neat slices.
For easy removal, you can line the baking dish with parchment paper, leaving an overhang on the sides.
Don’t overbake the bars. The top should be golden brown, and the filling should be bubbly.
- Prep Time: 20 minutes
- Cook Time: 55 minutes
- Category: Dessert
- Cuisine: American
