Lemon Blondies

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Hi Bold Bakers!

WHY YOU’LL LOVE THIS RECIPE: These Lemon Blondies are the perfect mashup of a chewy cookie bar and a tangy lemon bar. With rich brown butter, bright lemon flavor, and a sweet-tart glaze, they’re fudgy, flavorful, and incredibly easy to make—no mixer required.

• Bright Flavor: Brown butter, lemon zest, and lemon juice create a rich, citrusy base that’s deeply aromatic and complex.
• Dreamy Texture: These bars are dense, fudgy, and chewy like a brownie—but without chocolate. The glaze adds a soft, crackly finish.
• Simple Process: Uses the creaming method, no fancy equipment needed. A great beginner-friendly recipe.
• Expert Tip: Browning the butter enhances depth, while lemon juice restores moisture for the perfect bite.
• Versatile Treat: Serve them chilled or room temp—they’re equally addictive and great for make-ahead.

Vedika taught me this recipe, and I think the secret to this recipe is the browning of the butter. It adds a rich, deep, nutty flavor that really sets these blondies apart—I wouldn’t recommend skipping this step. And if you really want to take things to the next level, try mixing up the batter and refrigerating it overnight before baking. Let it sit at room temperature for about 30 minutes the next day, then bake as directed. This little bit of ‘aging’ time helps develop the flavor even more and gives you an even gooier, chewier texture.

IMPORTANT NOTE: This recipe was updated on 6/25/2025, to include explanations and substitutes of key ingredients, make-ahead and storage instructions, mix-ins and add-ons, answers to the most frequently asked questions, and Pro Chef Tips. 

Table of Contents

• What Makes Lemon Blondies Unique
• Tools You Need
• Key Ingredients and Substitutes
• How to Make Lemon Blondies
• Gemma’s Pro Chef Tips
• Make Ahead and Storage Instructions
• Mix-ins and Add-ons
• FAQs
• More Blondies & Brownies

What Makes Lemon Blondies Unique

Lemon blondies aren’t quite lemon bars, brownies, or cake—they’re their own delicious thing. They take the chewy, dense texture of a blondie and blend it with the bright, zesty flavor of a lemon dessert.

• Blondie Texture: Like a brownie without chocolate—soft, chewy, and rich from butter and sugar.
• Lemon Bar Flavor: Lemon is baked right into the batter for a bold, citrusy bite—no custard topping or crust needed.
• Glazed Finish: A simple lemon glaze adds a sweet-tart zing and a delicate, crackly top.

The result? A buttery, tangy bar that’s soft, satisfying, and refreshingly different.

Tools You Need

• 9*9-inch square pan
• Measuring cups
• Measuring spoons
• Mixing bowls
• Saucepan
• Whisk
• Spatula
• Cooling rack

Key Ingredients and Substitutes

Blondie Batter Ingredients

Butter

• Adds richness, moisture, and a deep nutty flavor when browned. I use salted butter for extra flavor, but unsalted butter will work as well.
• Substitute: Regular melted butter; flavor will be milder.

Lemon Zest

• Delivers concentrated citrus aroma and flavor.
• Substitute: Lime zest or omit for a subtler lemon taste.

Eggs

• Bind ingredients and help create a fudgy, chewy texture.
• Substitute: Flax eggs or commercial egg replacer (texture may vary slightly).

Granulated Sugar

• Sweetens and provides structure while letting the lemon shine.
• Substitute: Caster sugar; avoid brown sugar for this recipe.

Lemon Juice

• Boosts flavor and replaces moisture lost during browning.
• Substitute: Bottled lemon juice if needed; lime juice for variation.

Vanilla Extract

• Adds warmth and depth to balance the citrus.
• Substitute: You can use an equal amount of Vanilla Bean Paste. Or add lemon extract to your liking.

All-Purpose Flour

• Provides structure and chewiness.
• Substitute: 1:1 gluten-free flour blend or Almond Baking Mix.

Baking Powder

• Gives a slight lift for a tender crumb.

Salt

• Enhances and balances the overall flavor.

Lemon Glaze Ingredients

Powdered Sugar

• Also known as icing sugar or confectioner’s sugar. Sweetens and forms a smooth glaze.
• Substitute: Make your own powdered sugar in no time!

Lemon Juice

• Thins the glaze and adds bright tartness.
• Substitute: Bottled lemon juice; lime juice for a twist.

Vanilla Extract

• Rounds out the tartness with subtle warmth.
• Substitute: An equal amount of Vanilla Bean Paste or almond extract will work.

How to Make Lemon Blondies

To Make the Blondie Batter

1. Preheat the oven and prepare your pan: Preheat the oven to 350℉ (180℃). Butter and line a 9×9-inch square baking pan with parchment paper.
2. Brown the butter: In a small saucepan over low heat, melt the butter and let it cook for 5 to 8 minutes, until golden brown and fragrant. Swirl the pan occasionally for even browning.
3. Add lemon zest and let cool: Transfer the browned butter to a heatproof bowl. Stir in the lemon zest and let it cool for about 5 minutes.
4. Whisk in wet ingredients: Add the eggs, sugar, lemon juice, and vanilla extract to the cooled butter. Whisk until fully combined.

5. Mix dry ingredients separately: In a separate bowl, whisk together the flour, baking powder, and salt.
6. Combine wet and dry mixtures: Gently fold the dry ingredients into the wet mixture until just combined. Do not overmix.
7. Spread the batter in the pan: Pour the batter into the prepared pan and spread it evenly to the edges using a spatula.
8. Bake the blondies: Bake for 18 to 20 minutes, or until a toothpick inserted in the center comes out clean. Set aside to cool slightly.

To Make the Lemon Glaze

9. Whisk the glaze ingredients: In a medium bowl, whisk together powdered sugar, lemon juice, and vanilla extract until smooth and slightly runny.

To Glaze the Blondies

10. Glaze while warm: Pour the glaze over the slightly warm blondies and spread it evenly with a spatula.

11. Chill to set: Let the blondies cool completely, then refrigerate for about 15 minutes until the glaze is set and the bars are firm.
12. Cut and enjoy: Slice into squares and enjoy! Store leftovers in an airtight container in the refrigerator for up to one week.

Gemma’s Pro Chef Tips

• Brown Butter is Key: Browning the butter adds a rich, nutty depth that transforms these blondies from good to unforgettable. Don’t skip this step!
• Rest the Batter: For even better flavor and a gooier texture, refrigerate the batter overnight. Let it sit at room temperature for 30 minutes before baking.
• Watch Your Bake Time: Because of the dense, fudgy texture, bake just until a toothpick comes out mostly clean with a few moist crumbs to avoid drying out.
• Use Fresh Lemons: Fresh lemon zest and juice provide the brightest, most authentic citrus flavor — bottled juice can work but won’t be as vibrant.
• Glaze While Warm: Pour the lemon glaze over the blondies while they’re still slightly warm for a smooth, crackly finish.

Make-Ahead and Storage Instructions

• Make Ahead:

  • Mix the batter and refrigerate it overnight, covered.
  • Before baking, let the batter sit at room temperature for 30 minutes to enhance flavor and texture.

• Storage:

  • After baking and glazing, cool completely. Cover the pan with plastic wrap.
  • Store in an airtight container in the refrigerator for up to 1 week.
  • Serve chilled for a firmer texture or thaw at room temperature for a softer bite.

Mix-Ins and Add-Ons

Want to customize your lemon blondies? Here are a few easy ways to switch things up while keeping the base intact:

• White Chocolate Chips: Add ½ cup (3oz/85g) for a creamy, sweet contrast to the tart lemon.
• Fresh Raspberries or Blueberries: Gently fold in ⅓ cup (1.75oz/ 50g) for a burst of fruity flavor (toss in flour first to prevent sinking).
• Shredded Coconut: Add ¼ cup (0.7oz/20g) for extra texture and a tropical twist.
• Poppy Seeds: Stir in 1 tablespoon (0.3oz/9g) for a nod to lemon-poppy classics.
• Chopped Nuts: Walnuts or pistachios (about ⅓ cup/ 1.75oz/ 50g) add crunch and richness.
• Extra Lemon Punch: you can even use up to 1 tablespoon lemon zest, which adds brightness without throwing off the texture.

FAQs

Why are my lemon blondies dry or crumbly?

They may be overbaked. Check for doneness around 18 minutes—the toothpick should come out with a few moist crumbs, not completely dry.

What if my batter feels too thick or dry?

Ensure your butter is browned but not burned, and measure flour carefully by spooning and leveling. You can add a small splash of lemon juice or milk to adjust the consistency before baking.

How do I fix glaze that’s too runny or too thick?

If the glaze is too runny, gradually add more powdered sugar. If it’s too thick, thin it with a few drops of lemon juice.

Why isn’t the lemon flavor strong enough?

Use fresh lemon zest and juice, and don’t skip the glaze—it adds a bright, tangy finish that boosts the flavor.

What causes the blondies to be too dense or heavy?

Overmixing the batter after adding flour can make them dense. Fold gently to keep some air for a lighter texture.

 More Blondies & Brownies

• Best Ever Blondies
• Microwave Butterscotch Blondies (Full Batch)
• Lemon Blondies
• 3-Layer Apple Pie Blondies Recipe
• Best Chocolate Brownies Recipe

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Bigger Bolder Baking is thrilled to introduce you to the Bold Baking Network, a team of talented chefs, creators, and experts looking to teach, entertain and help you on your baking journey. Here are more articles from our amazing collaborators.

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IMPORTANT NOTE: This recipe was updated on 6/25/2025, to include explanations and substitutes of key ingredients, make-ahead and storage instructions, mix-ins and add-ons, answers to the most frequently asked questions, and Pro Chef Tips. 

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