Blueberry Blondies

The blueberries burst everywhere when I folded them in, leaving these beautiful purple streaks through the batter. I almost worried I'd ruined how they looked, but that marble effect became my favorite part about pulling them from the oven.

My roommate walked in while these were cooling and literally hovered over the pan until I cut them. We ate them warm with melting white chocolate running through, standing at the counter because neither of us wanted to wait for plates.

Ingredients

• 1 1/2 cups all-purpose flour: The foundation that gives structure while keeping the blondies tender
• 1/2 teaspoon baking powder: Just enough lift to make them rise without becoming cakey
• 1/2 teaspoon salt: Balances the sweetness and enhances the vanilla flavor
• 1/2 cup unsalted butter, melted: Use melted butter for that dense chewy texture blondies are famous for
• 1 cup light brown sugar, packed: Creates deep caramel notes and moisture
• 1 large egg: Binds everything together while adding richness
• 2 teaspoons vanilla extract: Dont be shy with this, it makes the batter sing
• 1 cup fresh or frozen blueberries: Fresh berries hold their shape better but frozen work in a pinch
• 1/2 cup white chocolate chips: Optional but recommended for creamy contrast to the tart berries

Instructions

Preheat your oven:

Set it to 350°F and line an 8x8 inch pan with parchment paper, letting some hang over the sides for easy lifting later.

Whisk the dry ingredients:

Combine flour, baking powder, and salt in a medium bowl, making sure there are no clumps.

Mix the wet ingredients:

Stir melted butter and brown sugar until completely smooth, then whisk in the egg and vanilla.

Combine everything:

Gradually add the dry mixture to the wet, mixing just until you dont see flour anymore.

Add the berries:

Fold in blueberries and white chocolate chips gently so you dont crush the fruit.

Spread and bake:

Even out the batter in the pan and bake 28 to 32 minutes until edges are golden.

Cool completely:

Let them rest in the pan before cutting, otherwise theyll fall apart.

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These became my go-to for summer potlucks because they travel so well and people always ask for the recipe. Something about that combination of tart berries and sweet blondie base feels special without being fussy.

Making Them Your Way

Ive tried swapping in raspberries and blackberries when blueberries felt too expensive, and honestly every version works. The key is keeping the fruit amount the same so the batter stays balanced.

Storage Secrets

These actually taste better on day two when the flavors have had time to meld together. Store them in an airtight container at room temperature and theyll stay soft for four days.

Serving Suggestions

Warm a blondie for 15 seconds and top with vanilla ice cream for the most incredible dessert.

• Sprinkle sea salt on top before baking for a sweet and salty vibe
• Add lemon zest to the batter for brightness
• These freeze beautifully for up to three months

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Hope these bring as much joy to your kitchen as they have to mine.

Recipe FAQs

→ Can I use frozen blueberries instead of fresh?

Yes, frozen blueberries work perfectly in this blondie batter. There's no need to thaw them first—just fold them in frozen. They may add a minute or two to the baking time and create slightly more moisture, but the results will still be delicious.

→ How do I know when the blondies are done baking?

Insert a toothpick into the center of the pan. It should come out with a few moist crumbs attached, not completely clean. The edges should appear golden brown. Overbaking will result in dry bars, so start checking at the 28-minute mark.

→ Can I substitute other fruits for the blueberries?

Absolutely. Raspberries, blackberries, or chopped strawberries all work beautifully. Just keep the same quantity and adjust baking time if the fruits seem particularly juicy. Dried cranberries or cherries are also great options.

→ How should I store these blondies?

Store in an airtight container at room temperature for up to 3 days. For longer storage, refrigerate for up to a week. You can also freeze wrapped individual portions for up to 3 months. They actually taste even better the second day as flavors meld.

→ What's the best way to cut clean bars?

Let the blondies cool completely in the pan before removing. For cleanest cuts, chill them in the refrigerator for 30 minutes, then use a sharp knife wiped clean between each cut. Lift the entire slab out using the parchment paper overhang.