I love this recipe because it feels like a balance between dessert and breakfast. I enjoy how the oats give it a hearty texture while the blueberries turn soft and jam-like as they bake. I also like that I can prepare a batch ahead of time and have an easy grab-and-go option for busy mornings.
Ingredients
2 1/2 cups fresh blueberries (rinsed off) 2 tablespoons fresh lemon juice 2 teaspoons corn starch 1/4 cup sugar 6 tablespoons unsalted butter (melted) 1 teaspoon vanilla 1 1/2 cups flour 1 1/2 cups old fashioned oats (not instant) 1/2 cup honey 1/4 cup brown sugar (packed) 1/2 teaspoon ground cinnamon pinch of salt
(Here’s a tip: Check out the full list of ingredients and measurements in the recipe card below.)
Directions
I preheat the oven to 350°F and line an 8×8 baking pan with parchment paper, leaving some overhang for easy removal.
I mix flour, oats, honey, brown sugar, cinnamon, and salt in a large bowl until combined.
I stir in melted butter and vanilla until the mixture starts to come together, then I use my hands to gently knead it into a crumbly dough.
I set aside 1 cup of the mixture for the topping.
I press the remaining oat mixture firmly into the bottom of the prepared pan to form an even crust.
In a separate bowl, I mix blueberries, lemon juice, sugar, and cornstarch until the blueberries are well coated.
I spread the blueberry mixture evenly over the crust layer.
I sprinkle the reserved oat mixture on top as a crumble topping.
I bake for about 45 minutes at 350°F, checking occasionally to make sure it does not over-brown.
I remove the bars from the oven and let them cool for about 10 minutes before slicing and serving.
Servings and timing
I usually get about 8 servings from this recipe. It takes me around 15 minutes to prepare and about 45 minutes to bake, making the total time approximately 1 hour.
Variations
I sometimes swap blueberries with raspberries or mixed berries depending on what I have. I also like adding a little lemon zest for extra brightness or chopped nuts for added crunch in the crumble topping.
storage/reheating
I store these bars in an airtight container at room temperature for up to 2 days or in the fridge for up to 5 days. When I want them warm, I heat them briefly in the microwave to soften the oats and bring out the blueberry filling.
FAQs
Can I use frozen blueberries instead of fresh?
I can use frozen blueberries, but I prefer not thawing them first so they do not release too much liquid.
Are these bars very sweet?
I find them mildly sweet, especially because the oats balance the fruit and honey.
Can I make them gluten-free?
I can use a gluten-free flour blend and certified gluten-free oats to adapt the recipe.
Can I double this recipe?
I can double it and bake it in a 9×13 pan, adjusting the baking time slightly.
How do I keep the crust from crumbling?
I make sure to press the oat mixture firmly into the pan so it holds together after baking.
Conclusion
I like making blueberry oatmeal breakfast bars because they are simple, filling, and easy to store for later. I enjoy how the soft blueberry layer pairs with the chewy oat crust, making them a convenient homemade option for breakfast or snacking.
Soft and wholesome Blueberry Oatmeal Breakfast Bars packed with juicy blueberries and a buttery oat crumble. A perfect grab and go breakfast or snack.
Author:Emma
Prep Time:15 minutes
Cook Time:45 minutes
Total Time:1 hour
Yield:8 servings
Category:Breakfast / Snack
Method:Baking
Cuisine:American
Diet:Vegetarian
Ingredients
Blueberry Filling:
2 ½ cups fresh blueberries, rinsed
2 tablespoons fresh lemon juice
2 teaspoons cornstarch
¼ cup sugar
Oat Crust & Crumble:
6 tablespoons unsalted butter, melted
1 teaspoon vanilla extract
1 ½ cups all-purpose flour
1 ½ cups old-fashioned oats (not instant)
½ cup honey
¼ cup brown sugar, packed
½ teaspoon ground cinnamon
Pinch of salt
Instructions
Preheat Oven: Preheat oven to 350°F (175°C). Line an 8×8-inch baking pan with parchment paper, leaving overhang for easy removal.
Make Crust & Crumble: In a large bowl, combine flour, oats, honey, brown sugar, cinnamon, and salt. Stir until combined. Add melted butter and vanilla, mixing until crumbly. Use your hands to knead lightly until mixture comes together (it will still be slightly dry and crumbly).
Reserve Crumble: Set aside 1 cup of the oat mixture for the topping.
Form Crust: Press the remaining oat mixture evenly into the bottom of the prepared pan.
Prepare Filling: In a medium bowl, mix blueberries, lemon juice, sugar, and cornstarch until well coated.
Assemble: Spread the blueberry mixture evenly over the crust. Sprinkle the reserved oat crumble on top.
Bake: Bake for 45 minutes, or until the top is golden and the filling is bubbly. Check occasionally to avoid over-browning.
Cool & Serve: Allow bars to cool for at least 10 minutes before slicing. Cut into squares and serve.
Notes
Let the bars cool longer for cleaner slices.
You can substitute frozen blueberries (do not thaw before using).
Add chopped nuts for extra crunch if desired.
Store in an airtight container in the fridge for up to 5 days.
