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Blueberry Blondie

Blueberry Blondies

These Blueberry Blondies are buttery, rich, and packed with fresh blueberries, making them the ultimate treat for dessert lovers.
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Prep Time 15 minutes
Cook Time 25 minutes
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 8x8 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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