Easy Blueberry Blondies Recipe

These blondies are my messy, beautiful answer to “I want dessert but also something breakfast-adjacent.” Dense, chewy, buttery base studded with juicy blueberries and just enough brown-sugary caramel notes to make everyone stop and stare. They bake into a golden crust with a soft, almost fudgy middle — like a blondie and a fruit bar had a very delicious baby.

My kids call these “blueberry squares” and my husband eats them warm with a mug of coffee like it’s his legal right. I once brought a pan to a backyard movie night and somebody actually hid a corner for later — the highest culinary compliment in my book. They’ve become the thing I make when company’s coming and when no one’s coming at all.

Kitchen Talk

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These blondies love a little chaos. I browned the butter once because I had too much time and holy moly — game changer. I also tried popping in huge, fresh blueberries and ended up with a soggy, beautiful mess; that taught me to toss the berries in a little flour first. I’ve baked them in glass, metal, and once in a muffin tin when someone demanded handheld portions. Sometimes I add a handful of white chocolate chips because I have no dignity. The recipe plays well with small improvisations, but don’t overmix the batter — we want tender, not cake.

Shopping Tips

– Baking Basics: Use all-purpose flour and light brown sugar for that caramel-y chew; check jars for clumps and choose a fine, fresh baking powder if your pantry’s old.
– Fats & Oils: Unsalted butter is your friend here — brown it for extra flavor, or use melted butter straight from the stove if you’re impatient.
– Fruit: Fresh blueberries are ideal, but frozen will work — do NOT thaw them first or they’ll bleed; toss frozen berries in a little flour so they don’t sink.
– Eggs: Room-temperature eggs mix more evenly and help the blondies rise and set without overworking the batter.
– Flavor Boosts: Real vanilla extract and a little lemon zest brighten the whole tray; avoid imitation vanilla if you can.

Prep Ahead Ideas

– Mix the dry ingredients and store them in an airtight container the day before to shave minutes off prep time.
– Toss blueberries with a tablespoon of flour and keep them in the fridge in a small bowl until you’re ready to fold — prevents sinking and bleeding.
– Make the batter and store it in the fridge for up to 24 hours; bake straight from chilled but add a few extra minutes to the bake time.

✔Time-Saving Tricks

– Use browned butter you made earlier in the week and froze in a jar — thaw in seconds and you’ll get flavor without the last-minute fuss.
– Measure dry ingredients into a single bowl (flour, salt, leavener) and wet ingredients into another, then fold once — less rinsing, fewer mistakes.
– Frozen berries = no washing, no fuss; add them straight from the bag and pop the pan in the oven.
– If you’re short on time, bake in a slightly smaller pan for a bit longer to keep that gooey center without overbaking the edges.

✔Common Mistakes

– Overbaking — I’ve done this and ended up with blondies that crumbled like bricks; pull them when a toothpick comes out with a few moist crumbs, not clean.
– Dumping thawed berries in — they’ll turn everything purple and make the batter too wet; keep them frozen or flour-tossed.
– Overmixing once the flour hits the bowl — you’ll develop gluten and lose that tender chew.
– Using salted butter without adjusting — it can push the blondies into too-savory territory; taste the batter if you’re unsure.

What to Serve It With

– A scoop of vanilla ice cream or whipped cream for hot-out-of-the-oven decadence.
– A big mug of coffee or a bright lemony tea — they cut the richness nicely.
– Quick arugula salad with lemon vinaigrette if you need a grown-up side to balance the sweet.
– Toasted almonds or a sprinkle of coarse sea salt on top for texture contrast.

✔Tips & Mistakes

– Test doneness with a toothpick in the center; a few moist crumbs = perfect.
– If edges are browning too fast, tent with foil and let the center finish.
– Don’t skip the flour toss for blueberries unless you like purple-stained batter.
– Cool completely for cleaner slices — but eat warm if you’re weak like me.

✔Storage Tips

Store blondies in an airtight container at room temperature for up to 3 days, or in the fridge for 5–7 days. They freeze well — wrap individual squares and stash in a freezer bag for up to 3 months. Cold blondies? Totally fine for breakfast. Warmed for 15 seconds in the microwave and a little scoop of yogurt or ice cream = absolute perfection. No shame in reheating one in the toaster oven for a crisper edge.

✔Variations and Substitutions

– Swap blueberries for raspberries or chopped cherries, but keep an eye on moisture — raspberries make it looser.
– Stir in white or milk chocolate chips for extra richness; dark chocolate is great if you want bitterness to balance sugar.
– For dairy-free, use coconut oil or vegan butter and check chocolate chips for dairy.
– Half almond flour can work for a nuttier flavor, but the texture will be denser — don’t expect an exact clone of the all-purpose version.
– Honey or maple syrup can replace some sugar, but reduce liquid elsewhere and accept a chewier, denser result.

Frequently Asked Questions

Easy Blueberry Blondies Recipe

Buttery, chewy blondies studded with juicy blueberries and a touch of vanilla. Simple to mix, bake, and slice for a crowd-pleasing treat.

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Prep Time: 15 minutes minutes

Cook Time: 28 minutes minutes

Total Time: 43 minutes minutes

Servings: 12

Ingredients

 

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Main Ingredients

• ▢ 9 tbsp unsalted butter, melted and cooled
• ▢ 0.75 cup light brown sugar, packed
• ▢ 0.25 cup granulated sugar
• ▢ 1 large egg room temperature
• ▢ 2 tsp pure vanilla extract
• ▢ 1.25 cup all-purpose flour
• ▢ 0.5 tsp baking powder
• ▢ 0.5 tsp kosher salt
• ▢ 1 tsp finely grated lemon zest optional, but brightens the berries
• ▢ 1 cup fresh blueberries patted dry
• ▢ 0.5 cup white chocolate chips optional

Instructions

Preparation Steps

• Preheat oven to 350°F. Line an 8-inch square pan with parchment, leaving an overhang. Lightly grease the sides.
• Whisk melted butter with brown sugar and granulated sugar until smooth and glossy.
• Whisk in the egg and vanilla until fully combined.
• In a separate bowl, whisk flour, baking powder, salt, and lemon zest. Remove 1 teaspoon of this mix to a small dish for the berries.
• Stir the dry ingredients into the butter mixture just until a few flour streaks remain.
• Toss blueberries with the reserved flour. Fold blueberries and white chocolate chips into the batter gently.
• Spread batter evenly in the pan and smooth the top.
• Bake 26–30 minutes, until the edges are set and a toothpick comes out with a few moist crumbs.
• Cool completely in the pan on a rack. Lift out using parchment and cut into 12 bars.

Notes

Try a quick lemon glaze for serving: whisk 1/2 cup powdered sugar with 1–2 tsp lemon juice and drizzle over cooled bars. Frozen blueberries work too—do not thaw, and bake 2–3 minutes longer. Store airtight at room temperature up to 3 days, or freeze up to 2 months.

This recipe is an original creation inspired by classic Easy Blueberry Blondies Recipe flavors. All ingredient ratios and instructions are independently developed.