Why You’ll Love This Recipe

Chocolate Blueberry Crumble Bars are the perfect fusion of rich cocoa and juicy blueberries, layered between a buttery oat crumble. These bars are chewy, chocolatey, and bursting with fruit, making them a satisfying dessert or snack. With a crisp top and gooey center, they’re easy to make and even easier to love.

ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

all-purpose flouroatsunsalted butterbrown sugargranulated sugardark cocoa powderbaking sodaeggvanilla extractfresh or frozen blueberriescornstarchlemon juicechocolate chips

directions

Preheat your oven to 350°F (175°C) and line an 8×8-inch baking dish with parchment paper.

In a large bowl, mix flour, oats, brown sugar, granulated sugar, cocoa powder, and baking soda.

Cut in the butter until the mixture resembles coarse crumbs.

Add the egg and vanilla extract and stir until a crumbly dough forms.

Press two-thirds of the mixture into the bottom of the prepared pan to form the base.

In a separate bowl, combine blueberries, cornstarch, and lemon juice. Mix until the berries are well coated.

Spread the blueberry mixture evenly over the crust.

Sprinkle chocolate chips over the blueberries.

Crumble the remaining dough mixture over the top.

Bake for 30-35 minutes or until the top is set and slightly golden.

Let the bars cool completely in the pan before cutting into squares.

Servings and timing

This recipe yields approximately 16 bars.Preparation time: 15 minutesBaking time: 30-35 minutesCooling time: 1 hourTotal time: 1 hour 50 minutes

Variations

Use white chocolate chips for a sweeter contrast.

Add chopped nuts to the crumble for extra crunch.

Swap blueberries for raspberries or cherries for a different flavor twist.

Add a pinch of cinnamon to the base for warmth.

Top with a drizzle of melted chocolate once cooled.

storage/reheating

Store in an airtight container at room temperature for up to 3 days or in the refrigerator for up to 7 days.Freeze in layers separated by parchment for up to 2 months.Thaw at room temperature and enjoy cold or slightly warmed in the microwave for 10–15 seconds.

FAQs

Can I use frozen blueberries?

Yes, no need to thaw them—just toss with cornstarch and lemon juice before using.

Do these bars travel well?

Yes, once cooled and cut, they hold their shape and are perfect for packing.

Can I make these gluten-free?

Use a gluten-free flour blend and certified gluten-free oats.

Can I make them dairy-free?

Substitute the butter with a plant-based alternative and use dairy-free chocolate chips.

Why is my crumble topping too dry?

Make sure to mix in the butter well, and add an extra tablespoon if needed to bind the dough.

Do I need to refrigerate the bars?

Only if keeping them for longer than a few days, otherwise room temperature is fine.

Can I double the recipe?

Yes, just use a 9×13-inch pan and adjust baking time as needed.

Can I reduce the sugar?

Yes, though the texture and sweetness will be affected slightly.

Do they freeze well?

Very well—wrap individually or freeze in layers.

Are they kid-friendly?

Absolutely—chocolate and blueberries are a winning combo for kids.

Conclusion

Chocolate Blueberry Crumble Bars offer a heavenly blend of sweet berries and rich chocolate in every bite. Whether you’re hosting a brunch, packing a lunchbox, or just craving something homemade, these bars are sure to satisfy. Simple, flavorful, and irresistibly chewy—they’re bound to become a go-to favorite