The Best Blueberry blondies recipe

If you’re a fan of blueberry muffins, then you need to give these a try! Blondies have a dense, chewy texture similar to brownies but with a buttery vanilla flavor instead of chocolate. The blueberries in the homemade jam add a burst of juiciness, enhancing the overall texture. Finish it off with a streusel on top, and you’ve got yourself a balanced and refreshing dessert.

Since you are here and love blondie recipes, check out this Chocolate Chip Brown Butter Blondies Recipe, this Easy Snickerdoodle Bars Recipe, or these White Chocolate Blondies.

Ingredients for this Blueberry blondies recipe

Here are the ingredients you will need to make these easy blueberry blondies. Make sure to scroll down to the recipe card at the bottom of the page for the detailed ingredient measurements.

Blondie base

• Butter: Use unsalted butter so that we can add the salt separately later. You will also want the butter to be softened, so pull it out of the fridge 30 minutes before starting the recipe.
• Light Brown Sugar: We are using light, but you can use dark if you want to have a deeper, more molasses-y flavor.
• Granulated Sugar: sweetens the dough without adding excess or unwanted flavors.
• Large Egg: helps the ingredients bind together to create the blondies structure.
• Vanilla Extract: adds a subtle yet helpful flavor boost.
• All-purpose Flour: Measure the flour using a kitchen scale. This will give you a much more accurate measurement and ensure your final product turns out right. Also, pass it through a sieve first before it goes in with the other ingredients to get rid of clumps.
• Baking Powder and Baking Soda: help the blondies rise so they aren’t overly dense.
• Salt: balances out the sweetness while enhancing all of the other flavors in the blueberry blondies recipe as well.

Blueberry topping

• Frozen Wild Blueberries: Frozen berries are great because they’re flash-frozen as soon as they’re harvested, so they’re usually fresher than non-frozen blueberries that you get in the produce area.
• Cornstarch: is used to help thicken the blueberry juice as it cooks.
• Water: to help smooth out the jam.
• Granulated Sugar: adds a touch of sweetness to the blueberries.
• Lemon Juice and Fresh Lemon Zest: compliment the flavor of the blueberries and actually enhances it.

Streusel topping

• All-purpose Flour: is the base of any crumbly streusel.
• Brown Sugar and Granulated Sugar: sweeten the streusel.
• Ground Cinnamon: adds a touch of spiced flavor.
• Pinch of Salt
• Butter: Again, use unsalted so we can add the salt separately.

How to make this blueberry blondies recipe

Make sure to scroll down to the recipe card at the end of this post for the full step-by-step instructions! 

1. Preheat your oven and grease with cooking spray or line an 8×8 inch square baking dish with parchment paper.

Make the blueberry topping

1. In a medium saucepan, add the blueberries, cornstarch, granulated sugar, lemon juice, lemon zest, and water and mix to combine.
2. Cook over medium heat mixing form time to time until the blueberries become jammy and thicken a little.

Make the streusel topping

1. In a small bowl, mix together the flour, granulated sugar, brown sugar, cinnamon, and salt for the streusel topping.
2. Pour the melted butter over the dry ingredients and mix with a fork until you have moist crumbs. Place the streusel bowl in the fridge while you make the blondie base.

​Make the blondie base

1. In a medium bowl, cream the butter, granulated sugar, and brown sugar until well combined.
2. Add the egg and vanilla extract, and mix until smooth.
3. Add in the flour, cornstarch, baking powder, baking soda, and salt and mix just until a soft cookie dough forms.
4. Spread the blondie batter evenly into the prepared pan with rubber spatula. Spread the blueberry jam on top of the batter, then add the crumble topping and bake in the preheated oven.
5. Bake until the edges are golden brown and a toothpick inserted into the center comes out clean.
6. Allow to cool completely before dusting with powdered sugar if desired and slicing into squares.

Why you need to make this recipe!

• This blueberry blondies recipe is the best way to enjoy desserts with delicious blueberry flavor.
• This easy recipe only requires a handful of simple ingredients that you can easily find at the grocery store.
• Dessert bars are a guaranteed crowd pleaser with their fudgy texture.

Frequently Asked Questions – FAQ

How to store leftover blondies?

To store, simply put your blondies in an airtight container or ziplock bag. They can stay out at room temperature for 3-4 days, in the fridge for one week, or in the freezer for up to a month.

Can I use fresh blueberries instead of frozen?

Of course! I just like the convenience of being able to keep frozen blueberries and enjoy this blueberry blondies recipe year-round. But fresh will work just fine as well.

Keep in mind that this recipe also uses wild blueberries which tend to be a little sweeter and stronger in flavor as well.

What different flavors can I try with this recipe?

• Add more lemon flavor to make lemon blueberry blondies by adding a lemon glaze on top.
• Add white chocolate chips in the blondie batter to make white chocolate blueberry blondies.
• Use strawberries instead of blueberries to make strawberry blondies. You can also use blackberries or even raspberries!

Can I Make this blueberry blondies recipe gluten-free?

Yes, you can make them gluten-free by substituting the all-purpose flour with a gluten-free flour blend. Make sure the blend includes xanthan gum or a similar binding agent to maintain the texture.

The Best Blueberry blondies recipe

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