Buttery, chewy, and loaded with melty chocolate in every bite—these blondies taste like a warm bakery hug.

There’s a moment, about ten minutes after these blondies come out of the oven, when the kitchen smells like caramelized brown sugar and the edges have set into that perfect, crackly-chewy bite. I stand there with a butter knife, pretending I’m “trimming the edges” so they’ll look neat for photos. In reality I’m surgically removing a corner square, still molten in the center, and blowing on it just long enough to keep my tongue from scorching. That first mouthful is pure nostalgia: the vanilla-perfumed batter, the buttery brown-sugar base, the way the chocolate chunks ribbon through the crumb like little lava flows of cocoa. My mom used to make a boxed version when I hosted study groups in high school; I’d arrive home to find the kitchen counter dusted with powdered sugar and a note that read, “Try not to eat the entire pan before your friends get here.” Spoiler: I rarely obeyed.

Fast-forward fifteen years and I’m still chasing that same sweet rush, only now I bake from scratch and insist on using a mix of semi-sweet chips and fudgy chocolate chunks so every bite has a different kind of melt. These blondies have become my go-to for everything from pot-luck brunches to “I-just-need-something-in-the-freezer-for-emergencies” situations. They travel well (hello, beach picnics), slice cleanly for lunchboxes, and—best of all—require only one bowl and ten minutes of active prep. If you, too, grew up team-blondie instead of team-brownie, prepare to lose all self control.

Why This Recipe Works

Butter-to-Brown-Sugar Ratio: A generous 1:1.4 proportion guarantees that chewy, almost toffee-like center without being greasy.
One-Bowl Method: Melting the butter first lets you whisk everything in the same vessel—no mixer, no extra dishes.
Two-Temperature Bake: A quick burst at high heat sets the edges, then lower temp finishes the center gently so it stays gooey.
Chocolate Layering: Chips in the batter + chunks pressed on top = pockets of molten chocolate in every bite.
Maldon Finish: A whisper of flaky salt on top balances sweetness and amps up caramel notes.
Freezer-Friendly: They thaw like dream, tasting freshly baked in under 30 minutes on the counter.
Customizable Pan Size: Bake in an 8×8 for extra-thick bakery squares or a 9×13 for party-perfect sharing.

Ingredients You'll Need

Great blondies start with great basics. Below are the non-negotiables plus my favorite insider swaps so you can shop once and bake repeatedly.

Unsalted Butter: I reach for European-style (82 % fat) because the extra butterfat carries flavor and promotes that chewy middle. If you only have salted butter, omit the ½ tsp kosher salt later. Make sure it’s melted but not scorching; 30-45 seconds in the microwave usually does it.

Light Brown Sugar: Dark brown works in a pinch, yet the molasses can overshadow the vanilla. Pack it tightly—air pockets rob you of that glossy top crust. Organic brands tend to be slightly more moist; if yours feels brick-hard, tuck a slice of bread in the container overnight and it’ll soften by morning.

Large Eggs: Room-temperature eggs emulsify into the butter better, preventing that curdled look. Forgot to pull them out? Submerge in warm (not hot) tap water for 10 minutes.

Vanilla Extract: Splurge on real vanilla here—blondies don’t have cocoa to hide imitation notes. Two teaspoons may seem like a lot; it’s not. For a bakery twist, scrape in ¼ of a vanilla bean plus the extract.

All-Purpose Flour: I develop recipes with 11.7 % protein (King Arthur). If your local brand is lower protein, swap 2 Tbsp of flour for bread flour to reinforce chew.

Chocolate: A 60 % cacao bar chopped into rustic shards melts into puddles, while mini chips ensure you get chocolate in the background bites. My ratio is ¾ cup chips in batter + ½ cup chunks pressed on top. Feel free to sub in bittersweet or even white chocolate for contrast.

Cornstarch: Just 1 tsp keeps the crumb tender—no weird taste, zero grittiness.

Leavening: ¾ tsp baking powder lifts the batter just enough to avoid dense brick status without cakey dryness.

How to Make Indulgent Chocolate Chip Blondies with Chocolate Chunks

Prep Pan & Oven

Preheat oven to 350 °F (177 °C). Line an 8×8-inch metal pan with parchment, leaving overhang on two sides for easy removal. Lightly butter any exposed surfaces to prevent sticking.

Melt Butter & Bloom Sugar

In a medium microwave-safe bowl melt 12 Tbsp (170 g) unsalted butter. Immediately whisk in 1 ¾ cup packed light brown sugar. The residual heat dissolves sugar crystals, creating a glossy slurry that promotes that paper-thin shiny crust on top of the blondies.

Add Eggs & Vanilla

Whisk in 2 large eggs one at a time until fully incorporated, then 2 tsp pure vanilla extract. The batter will loosen and turn a shade lighter—this is the emulsion building. Over-whisking here incorporates excess air leading to cakey blondies, so stop once the mixture is homogenous.

Fold Dry Ingredients

Sprinkle 1 ¾ cup (210 g) all-purpose flour, 1 tsp cornstarch, ¾ tsp baking powder, and ½ tsp kosher salt on top. Using a silicone spatula, fold until only a few streaks of flour remain. Add ¾ cup (135 g) semi-sweet chips and fold just until no flour pockets remain. Over-mixing develops gluten and yields tough squares.

Transfer & Top

Spread batter into prepared pan; it will be thick. Using an offset spatula, press into corners creating an even layer. Scatter ½ cup (85 g) chopped chocolate chunks across surface and gently press so they adhere. Optional: sprinkle with a pinch of flaky sea salt for bakery sophistication.

Two-Temp Bake

Bake 10 minutes at 350 °F, then reduce to 325 °F (163 °C) for 18–20 minutes more. Edges should be puffed and golden, center just set with a slight jiggle. A toothpick inserted 2 inches from edge comes out with a few moist crumbs; avoid over-baking—carry-over heat finishes the center as it cools.

Cool Completely

Place pan on wire rack 2 hours until fully cooled. Resist cutting early; residual steam finishes baking and firms the crumb. For ultra-clean slices, chill 30 minutes then use a hot, dry knife.

Slice & Serve

Lift parchment handles to remove. Trim ¼-inch edges if you’re extra (baker’s treat!), then cut into 16 squares using a ruler for uniformity. Serve at room temp for maximum chew, or warm 10 seconds in microwave for melty chocolate nostalgia.

Expert Tips

Weigh Your Sugar

Brown sugar packs differently depending on humidity. 210 g guarantees consistent texture every single bake.

Moisture-Lock Trick

Add 1 tsp honey or corn syrup; both are humectants that keep blondies chewy through day four.

Chill for Clean Cuts

After cooling, refrigerate 20 min; chocolate firms, allowing razor-sharp bakery-style edges.

Infuse the Butter

Drop in a sprig of rosemary while melting; remove before mixing for subtle herbaceous undertone.

Even-Height Bars

Use an icing comb or the back of a spoon to create shallow grooves; chocolate settles evenly on top.

Freeze Individual Slices

Wrap each square in parchment, then foil. Microwave 20 seconds straight from frozen—tastes fresh-baked.

Speed-Cool Hack

Set the pan over a couple of ice packs; cuts cooling time in half without compromising texture.

Flavor Layering

Swap 1 Tbsp flour for 1 Tbsp malted milk powder for subtle caramel complexity—tastes like a blondie crossed with a malt ball.

Variations to Try

Browned Butter Pecan: Brown the butter until the milk solids turn hazelnut colored; cool 5 min before mixing. Fold in ¾ cup toasted chopped pecans with the chips.
White Chocolate Raspberry: Replace semi-sweet chips with white chocolate, swirl ⅓ cup seedless raspberry jam through the batter before baking.
Salted Maple Walnut: Swap ¼ cup brown sugar for maple sugar, top with maple-glazed walnuts and flaky salt.
Pretzel Toffee: Stir in ½ cup crushed pretzels and ⅓ cup toffee bits; press extra pretzels on top for crunch.
Gluten-Free: Replace flour with 210 g high-quality 1:1 gluten-free blend plus ¼ tsp xanthan gum (if not included).
Vegan: Swap butter for refined coconut oil, eggs for 2 flax eggs (2 Tbsp flax + 5 Tbsp water), use dairy-free chocolate.

Storage Tips

Room Temperature: Once completely cool, store squares in an airtight container up to 4 days. Layer with parchment to prevent sticking. Keep away from direct sunlight or heat sources so the chocolate doesn’t “bloom.”

Refrigerator: Not recommended unless ambient temperature is >80 °F; refrigeration dries the crumb. If you must, wrap each bar in plastic, then foil, and consume within 1 week. Return to room temp before serving.

Freezer (Baked): Wrap individual squares in parchment, slide into zip-top bags, freeze up to 3 months. Thaw on counter 30 minutes or microwave 15–20 seconds.

Freezer (Dough): Press dough into foil-lined pan, freeze raw until solid. Transfer dough block to bag; bake from frozen—add 5–7 minutes to total time. Perfect for surprise guests.

Frequently Asked Questions

Absolutely. Double ingredients and bake in a 9×13-inch pan. Timing remains almost identical; start checking at 25 minutes total.

Over-baking or over-mixing after adding flour develops gluten. Next time, pull blondies when a 2-inch perimeter looks set but center still jiggles, and fold only until flour disappears.

Yes, though coconut sugar is less moist. Add 1 Tbsp milk or water to compensate and expect a slightly more caramel, almost butterscotch flavor.

Toss chips in 1 tsp flour before folding into batter; this provides friction and keeps them suspended. Also, don’t skimp on the 1 tsp cornstarch—it thickens the batter just enough.

Glass retains more heat, often over-browning edges. Lower oven to 325 °F for the entire bake and add 3–4 minutes.

Look for a dull finish on top, slightly puffed edges, and a 2-inch border that springs back when gently pressed. Center should wiggle like gelatin, not slosh like liquid.

Indulgent Chocolate Chip Blondies with Chocolate Chunks

Why This Recipe Works

Ingredients You'll Need