Chewy Blueberry Blondies Recipe with Lemon Glaze

If you love blueberry muffins, you’ll enjoy these blondies. They have a chewy, fudgy texture like brownies but with a buttery vanilla base instead of chocolate. A homemade blueberry jam layer adds juicy bursts, and a cinnamon streusel gives a crisp finish for a balanced, refreshing dessert.

Ingredients for Blueberry Blondies

Below are the components you’ll need. The recipe card further down lists precise measurements.

Blondie base

• Unsalted butter: softened so it creams easily with the sugars.
• Light brown sugar: for a subtle molasses note (dark brown works for a deeper flavor).
• Granulated sugar: balances sweetness without altering flavor.
• Large egg: binds the batter and gives structure.
• Vanilla extract: enhances the buttery, sweet base.
• All-purpose flour: measure accurately; sift to avoid lumps.
• Baking powder and baking soda: provide a light lift so the blondies aren’t too dense.
• Salt: balances sweetness and boosts flavor.

Blueberry topping

• Frozen wild blueberries: flash-frozen fruit keeps flavor year-round; fresh berries also work.
• Cornstarch: thickens the blueberry juices as they cook.
• Water: helps dissolve the cornstarch and smooth the jam.
• Granulated sugar: sweetens the berry layer.
• Lemon juice and zest: brighten and enhance the blueberry flavor.

Streusel topping

• All-purpose flour: forms the crumb base.
• Brown sugar and granulated sugar: sweeten and add texture.
• Ground cinnamon: adds warm spice notes.
• Pinch of salt
• Unsalted butter: melted and mixed into the dry ingredients to create crumbs.

How to make Blueberry Blondies

Scroll to the recipe card for exact measurements and full instructions. This summary covers the main steps.

1. Preheat the oven to 350°F (175°C) and grease or line an 8×8 inch (20×20 cm) baking pan with parchment.

Make the blueberry topping

1. Combine blueberries, cornstarch, granulated sugar, lemon juice, lemon zest, and water in a medium saucepan.
2. Cook over medium heat, stirring occasionally, until the mixture becomes jammy and slightly thickened. Transfer to a bowl to cool completely.

Make the streusel topping

1. Mix flour, granulated sugar, brown sugar, cinnamon, and salt in a small bowl.
2. Pour melted butter over the dry mix and stir with a fork until moist crumbs form. Chill while you prepare the blondie batter.

Make the blondie base

1. Cream the softened butter with granulated and brown sugar until well combined.
2. Beat in the egg and vanilla until smooth.
3. Fold in flour, cornstarch, baking powder, baking soda, and salt just until a soft dough forms.
4. Spread the batter evenly into the prepared pan. Spoon the cooled blueberry jam over the batter, then sprinkle the streusel on top.
5. Bake for about 40 minutes, or until the edges are golden and a toothpick inserted in the center comes out clean.
6. Cool completely before slicing. Dust with powdered sugar if desired.

Why make these blueberry blondies?

• They combine buttery blondie texture with bright blueberry flavor for a crowd-pleasing dessert.
• The recipe uses simple, easy-to-find ingredients and is straightforward to prepare.
• Dessert bars are portable and serve well at parties, picnics, or casual weekends.

Frequently Asked Questions

How do I store leftover blondies?

Store bars in an airtight container at room temperature for 3–4 days, in the refrigerator for up to one week, or frozen for up to one month. Thaw before serving.

Can I use fresh blueberries instead of frozen?

Yes — fresh berries work well. Frozen wild blueberries are convenient and often pack concentrated flavor, but fresh will yield excellent results too.

What flavor variations can I try?

• Add a lemon glaze for lemon-blueberry blondies.
• Stir white chocolate chips into the batter for white chocolate blueberry blondies.
• Substitute strawberries, raspberries, or blackberries for different fruit bars.

Can I make these gluten-free?

Yes. Replace the all-purpose flour with a 1:1 gluten-free flour blend that contains a binding agent (like xanthan gum) to keep the texture similar.

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