Blueberry Crumb Bars

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Blueberry crumb bars are a sweet dessert with a blueberry filling and an oatmeal crumb crust. These bars are perfect for a casual dessert or for a fun lunch box treat. Fresh or frozen blueberries can be used in this recipe.

These blueberry bars are a fun treat! I’ve made a similar dessert in the past using applesauce in these oat bars and raspberry jam in raspberry oat bars.  For this recipe I made a quick pie filling and added it to the bars.  You might like is peach crumb bars or strawberry bars. 

How do you make the crust?

This crust is easy to make. I do it all in the food processor and the ingredients are simple. You just need flour, brown sugar, butter, ground cinnamon, salt and oats. 

To make the bars,

1. Place everything except oats in the food processor
2. Pulse until the mixture resembles coarse crumbs
3. Add oats and pulse until incorporated
4. Divide mixture in half and press half the mixture into the bottom of a pan.
5. Save the other half to crumble over filling

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How do you make the filling?

You need blueberries, cornstarch, sugar, lemon zest, salt and water.

1. Add all filling ingredients to a pot.
2. Heat over medium heat until it begins to simmer. Stir often to avoid scorching.
3. Remove from heat and pour over crust

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How long do the bars bake?

These blueberry crumb bars bake in a low 325 degree oven for 40 minutes.

Fresh or frozen blueberries?

One of the best parts of this recipes is that you can use either fresh or frozen blueberries! I often have blueberries in my freezer and it’s so easy to pull them out and add to this recipe. You will use fresh or frozen berries in the exact same way and the only thing that will change is it will take a few extra minutes for the frozen berries to come to a simmer. 

Does it matter what kind of oats I use?

I use old fashioned oats which are a thicker, slower cooking oat. I don’t care to use quick oats or 1 minute oats. They will work in this recipe, but I prefer the oats to be a bit more substantial in the crust. You can use whatever you have on hand. 

These blueberry bars are best eaten at room temperature. The bars will hold together once they are cooled. I’ve cut these apart while still warm and they are delicious, but the bars don’t hold their shape very well. 

Tips for making Blueberry Crumb Bars

• Use old fashioned oats for the best texture
• Cut butter into small pieces before adding to food processor
• Add a bit of water to the bottom of the pot prior to adding blueberry filling ingredients. This helps prevent scorching before the blueberry juices start flowing.
• Allow bars to cool before cutting and serving

Other great blueberry recipes

• Blueberry pancakes
• Blueberry lemon bread
• Blueberry muffins
• Blueberry banana coffee cake
• Blueberry popsicles

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5 from 4 votes

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Blueberry Crumb Bars

Prep Time

20 mins

Cook Time

50 mins

Total Time

1 hr 10 mins

 

Sweet blueberry filling with an crumbly oat crust.

Course: Dessert

Cuisine: American

Keyword: blueberry bars, blueberry crumb bars, oat bars

Servings: 12 people

Calories: 350 kcal

Author: Kathy

Ingredients

Crust

• 1 cup butter cut into small pieces
• 1 cup brown sugar
• 2 cups flour
• 2 teaspoons cinnamon
• 1/2 teaspoon salt
• 1 cup oats

Filling

• 3 cups blueberries
• 1/4 cup granulated sugar
• 2 tablespoons corn starch
• 1 pinch salt
• 1 Tablespoon water

Instructions

Crust

1. Place butter, brown sugar, flour, cinnamon and salt in a food processor.

2. Pulse until mixture is combined and crumbly.

3. Add oats and pulse until combined.

4. Divide mixture into two equal parts. Place one half into a greased 11 X 7 inch baking dish. Pat crust firmly down. Reserve other half for top.

Filling

1. Place water, berries, sugar, corn starch and salt in a sauce pan. Heat over medium heat, stirring often, until simmering. Remove from heat.

2. Pour filling over prepared crust.

Baking

1. Sprinkle remaining crust on top.

2. Bake in a preheated 325 degree oven for 40 minutes.

3. Allow bars to fully cool before cutting and serving. Cut into 12 equal pieces.

Recipe Notes

Tips for making Blueberry Crumb Bars

• Use old fashioned oats
• Cut butter into small pieces before adding to food processor
• Add a bit of water to the bottom of the pot prior to adding blueberry filling ingredients. This helps prevent scorching before the blueberry juices start flowing.
• Allow bars to cool before cutting and serving
• Fresh or frozen berries may be used in this recipe

Nutrition Facts

Blueberry Crumb Bars

Amount Per Serving (1 bar)

Calories 350 Calories from Fat 144

% Daily Value*

Fat 16g25%

Saturated Fat 10g63%

Cholesterol 41mg14%

Sodium 242mg11%

Potassium 104mg3%

Carbohydrates 49g16%

Fiber 2g8%

Sugar 26g29%

Protein 4g8%

Vitamin A 493IU10%

Vitamin C 4mg5%

Calcium 32mg3%

Iron 2mg11%

* Percent Daily Values are based on a 2000 calorie diet.