Blueberry Blondies
These easy Blueberry Blondies are made with a chewy blondie layer, topped with a homemade blueberry jam, and a delicious crumble topping. It's the perfect summer dessert to use up all the fresh blueberries you picked this season.
Ingredients
Blueberry Jam
- 1 cup (6 oz.) blueberries fresh or frozen
- 2 tablespoon granulated sugar
- 1½ teaspoon cornstarch
- 2 teaspoon lemon juice
- zest of half a lemon
Crumble
- ⅓ cup (40g) all purpose flour
- 3 tablespoon brown sugar packed
- 2 tablespoon unsalted butter melted
- pinch of salt
Blondies
- ½ cup (1 stick) unsalted butter melted
- ¾ cup (150g) brown sugar packed
- ¼ cup (50g) granulated sugar
- zest of one lemon
- 1 egg + 1 egg yolk room temperature
- 1 teaspoon vanilla extract
- 1¼ cup (150g) all purpose flour
- ½ teaspoon salt
- ¼ cup blueberries fresh or frozen
Instructions
Blueberry Jam
- In a medium sauce pan, add blueberries, sugar, lemon juice, lemon zest, and cornstarch and place over medium heat. Let bubble and simmer and stir frequently for 5-7 until the blueberries thicken. Turn off the heat.1 cup (6 oz.) blueberries, 2 tablespoon granulated sugar, 1½ teaspoon cornstarch, 2 teaspoon lemon juice, zest of half a lemon
- Let cool completely. You can make this in advance.
Crumble
- In a bowl, add flour, sugar, a pinch of salt, and mix completely, then add the butter and mix until it forms a crumble. Set it aside while you make the batter.⅓ cup (40g) all purpose flour, 3 tablespoon brown sugar, 2 tablespoon unsalted butter, pinch of salt
For the Blondie Batter
- Preheat oven to 350° F.
- Line an 8x8 light colored metal baking pan with parchment paper and set aside.
- Mix the batter: In a medium bowl, add slightly cooled melted butter, sugars, and lemon zest and mix using a spatula until combined. Add the egg, yolk, and vanilla and mix until combined. Add the salt the flour and mix until incorporated.½ cup (1 stick) unsalted butter, ¾ cup (150g) brown sugar, ¼ cup (50g) granulated sugar, zest of one lemon, 1 egg + 1 egg yolk, 1 teaspoon vanilla extract, 1¼ cup (150g) all purpose flour, ½ teaspoon salt
- Add the topping: Pour the batter into the prepared pan, then top with the blueberry jam, the blueberries, and the crumble.¼ cup blueberries
- Bake the Blondies: Bake for 25-30 minutes. You'll see the sides get a little light brown and the middle will have puffed up some. A toothpick inserted in the center should come out with just a little crumbs. Don't over bake.
- Remove from oven and allow to cool before slicing.
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