Blueberry Blondies

These chewy Blueberry Blondies are a must-try for anyone who loves a dessert that’s both simple and irresistible. They’re just like blueberry muffin blondies, with a soft, buttery texture and bursts of juicy blueberries in every bite. Plus, they’re incredibly simple to make just one bowl, a whisk, and a spatula, no electric mixer required! The combination of fresh lemon zest and sweet blueberries creates a bright, refreshing flavor, while the buttery streusel topping adds the perfect crunch. If you’re looking for easy blueberry blondies that come together effortlessly and taste amazing, this is the recipe you’ll want to bake over and over again!

Why You Will Love These

• Quick & Easy – Made in one bowl with minimal prep, these bars are baked in less than a half hour. No need for chilling!
• Full of Flavor – Every bite is packed with juicy blueberries and a sugary crumb top, making these lemon blueberry blondies a tangy, sweet delight.
• Perfect Party Food – Whether you’re serving brunch, parties, or showers, these blondies blueberry cheesecake bars are a guaranteed hit with their rich, creamy texture and fruity flavor.
• Make-Ahead & Easy to Serve – Bake them in advance for a stress-free, crowd-pleasing dessert that’s easy to slice and serve.

Ingredients Notes

Eggs – These should be at room temperature before beginning to ensure proper mixing and a smooth batter.

Blueberries – Always use fresh for the best texture. If using frozen, do not thaw to avoid excess moisture in your blueberry blondies.

Brown Sugar – This recipe calls for light brown sugar, but dark or golden yellow sugar can also be used for a deeper caramel-like flavor.

Butter – Unsalted butter is preferred. It should be melted and then cooled before mixing into the batter.

Flour – Standard all-purpose flour is ideal for achieving the perfect texture.

Lemon – Only the zest of half a large lemon is used to enhance the flavor without adding excess liquid.

Step-by-Step Instructions

1. Whisk together butter and brown sugar in a bowl until well combined. Add the egg, yolk, and vanilla, then mix until smooth. If you’re looking for a blueberry blondies vegan option, swap the butter for a plant-based alternative and use a flax egg instead.
2. Stir in cornstarch, baking powder, salt, and flour until just incorporated. Gently fold in the blueberries to avoid breaking them.
3. In a small bowl, mix brown sugar, flour, cinnamon, and salt. Add diced butter (or a dairy-free substitute for a vegan version) and use a fork or your fingers to work it into the dry mixture until it becomes crumbly and sand-like.
4. Transfer the batter into a prepared baking pan and smooth it out using a spatula for an even surface. Sprinkle the crumb topping evenly over the top.
5. Bake for 27-32 minutes or until the top is golden brown and the edges start to pull away from the pan. Let it cool completely before cutting. Dust with powdered sugar if desired.

Expert Baking Tips

Using a gram scale is the best way to ensure accurate measurements in your kitchen. This simple tool makes a huge difference when baking blueberry blondie bars by giving you precise amounts of ingredients every time. Avoid over-mixing the batter stir until everything is just combined to keep the texture soft and chewy. When preparing your pan, let parchment paper hang over the sides for easy removal. Once baked, run a butterknife along the edges before carefully lifting out the blondies.

For the best flavor, use fresh blueberries, but if you only have frozen, add them directly without thawing to prevent excess moisture in the blueberry blondies brownies. Let the bars completely cool before slicing to get clean slices without crumbling. Taking these extra steps will help you bake perfect blueberry blondies every time!

Storing & Freezing Blueberry Blondies

To keep your blueberry crumble blondies fresh, store them in an airtight container at room temperature for up to three days. If you prefer a longer shelf life, refrigerate them for up to a week. For the best texture, let them come to room temperature before serving.

If you want to freeze these healthy blueberry blondies, wrap each piece tightly in plastic wrap and place them in a freezer-safe container. They can be stored for up to three months. When ready to enjoy, thaw them in the fridge overnight or at room temperature for a few hours. Whether you’re making a batch of blueberry blondie cake for later or meal prepping ahead, these blondies freeze beautifully without losing their chewy texture!

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Blueberry Blondies

These Blueberry Blondies are buttery, rich, and packed with fresh blueberries, making them the ultimate treat for dessert lovers.

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 25 minutes mins

Course Breakfast

Cuisine American

Servings 12

Calories 250 kcal

Ingredients

  

• 1/2 cup 113g unsalted butter, melted and cooled
• 3/4 cup 150g light brown sugar, packed
• 1 large egg at room temperature
• 1 egg yolk at room temperature
• 1 teaspoon vanilla extract
• 1 cup 125g all-purpose flour
• 1/2 teaspoon baking powder
• 1/4 teaspoon salt
• 1 teaspoon cornstarch
• 1/2 cup 75g fresh blueberries

For the Crumb Topping:

• 1/4 cup 50g brown sugar
• 1/4 cup 30g all-purpose flour
• 1/2 teaspoon cinnamon
• 1/8 teaspoon salt
• 2 tablespoons 28g unsalted butter, diced and cold

Instructions

 

• Preheat your oven to 350°F. Line an 8×8 baking pan with parchment paper and lightly coat it with cooking spray to prevent sticking.
• In a medium bowl, whisk together the butter and brown sugar until fully combined. Add the egg, yolk, and vanilla extract, then mix until smooth.
• Gently stir in cornstarch, baking powder, salt, and flour until just incorporated. Carefully fold in blueberries, ensuring they stay whole.
• In a small bowl, mix brown sugar, flour, cinnamon, and salt. Add diced butter and use a fork or your fingers to work it into the dry ingredients until the mixture is crumbly and sand-like.
• Pour the batter into the prepared baking pan and use a spatula to smooth it out evenly. Sprinkle the crumb topping over the batter. Bake for 27-32 minutes until the top is golden brown and the edges start pulling away from the pan.
• Allow the blondies to cool completely before slicing to ensure clean cuts. For an extra touch, dust with powdered sugar before serving.
• These blueberry blondies are perfect for brunch, parties, or an easy make-ahead dessert. Serve them as is or with a scoop of ice cream for a decadent treat!

Notes

Using Frozen Blueberries

If you’re using frozen blueberries, it’s best to not defrost them before adding them to the batter. Thawing releases excess juice, which can lead to overly wet batter and uneven baking. However, keep in mind that using frozen berries may result in a slightly purple tint in the bars as they bake. This doesn’t affect the taste but gives the blondies a rustic look.

Measuring Ingredients Accurately

For the best results, always measure ingredients carefully. While I’ve provided both cups and grams, using grams ensures more precise measurements, especially for ingredients like flour. A kitchen scale is the most reliable tool, but if you don’t have one, no problem! Just lightly spoon flour into your measuring cup instead of scooping directly from the bag. This prevents it from getting packed, which can lead to dense blondies. Keeping the flour light and fluffy is the key to achieving a perfectly soft texture.

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