These gluten-free lemon brownies are the delicious cross between a lemon bar and a fudgy brownie. They’re dense and chewy rather than cakey, loaded with fresh lemon zest and a bright glaze that balances sweet and tart. The lemon flavor deepens as they rest, so they often taste even better the next day. They’re especially popular at spring and summer gatherings — bring a pan and they’ll disappear fast.
No mixer is required — just a bowl, whisk, and a microplane for zesting. The batter comes together in about 10 minutes of hands-on time. You will need to wait for the brownies to cool before glazing, but the actual prep is quick and straightforward.
Why You’ll Love this Recipe
- No mixer needed. Just a bowl, a whisk, and a microplane—keeping the batter dense and fudgy.
- Quick to mix. About 10 minutes of hands-on time; cooling is required before glazing.
- Dense and fudgy. The texture is brownie-like but with bright lemon flavor instead of chocolate.
Ingredients
Ingredient Notes
- Gluten-Free Flour Blend – Use a 1:1 gluten-free baking flour that contains xanthan gum for best texture. The recipe was tested with Bob’s Red Mill 1-to-1; other brands may behave differently.
- Salt – Enhances sweetness and brightens the lemon flavor. Table or kosher salt works fine.
- Granulated Sugar – Use white granulated sugar to keep the lemon flavor clean. Brown sugar changes texture and flavor.
- Lemon Zest – Most lemon flavor comes from the zest. Use 2–3 tablespoons; 3 tablespoons gives a strong lemon profile. You’ll need 3–4 large lemons to yield that much zest.
- Unsalted Butter – Melt, then let cool slightly before combining so it doesn’t cook the eggs.
- Eggs – Use large eggs at room temperature to emulsify smoothly with the butter.
- Lemon Juice – Always use fresh lemon juice. You’ll need 2 tablespoons for the batter and 3 tablespoons for the glaze.
- Lemon Extract – A small amount boosts lemon flavor; don’t overdo it or the extract can taste artificial.
- Powdered Sugar – For the glaze; whisk with lemon juice and a bit of zest until pourable.
Ingredient Tip
Most large lemons yield about 3–4 tablespoons of juice, so you may have extra after zesting. Freeze any leftover juice or use it in other recipes that call for lemon juice.
Step-by-Step Instructions
These lemon brownies use nine simple ingredients. The photos below show important stages: rubbing zest into sugar, mixing the batter, and glazing the cooled bars.
Watch for the sugar turning pale yellow after zesting, the batter’s thick consistency, and the glaze’s thin, pourable texture.
For the full ingredient list with measurements, printable recipe, and notes, see the recipe card below.
Recipe FAQs
Leaving out baking powder and baking soda keeps the brownies dense and fudgy. Adding leaveners made the bars too cake-like in testing.
Yes. Refrigerate the glaze and bring it to room temperature, stirring before using. If needed, thin with a bit of lemon juice.
Yes — about ¾ cup of white chocolate chips folded into the batter works well if you want a sweeter mix-in.
Expert Tips
- Rub zest into the sugar. This releases the oils and infuses the sugar with lemon flavor.
- Use fresh lemons. Fresh zest and juice provide the vibrant flavor bottled juice lacks.
- Weigh your flour. For consistent, fudgy results use a food scale when measuring gluten-free flour.
Storage Instructions
- Storage: Keep leftover brownies in an airtight container at room temperature for up to 3 days. The lemon flavor often improves after a day.
- Freezer Option: Freeze bars on a parchment-lined sheet until firm, then transfer to a freezer-safe container for up to 3 months. Thaw at room temperature.
Serving Suggestions
These lemon brownies pair well with light beverages and fresh fruit. Serve with a refreshing lemonade or a small scoop of macerated strawberries to complement the tangy glaze. They’re an ideal dessert for warm-weather gatherings.
More gluten-free desserts to try
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Gluten-Free Lemon Brownies
Ingredients
For the brownies:
- 1 cup (200 g) granulated sugar
- 3 tablespoons (18 g) lemon zest — from 3–4 large lemons
- ¾ cup (170 g) unsalted butter, melted and slightly cooled
- 2 large eggs (about 100 g)
- 2 tablespoons (30 g) fresh lemon juice
- ¾ teaspoon lemon extract
- 1 teaspoon salt
- 1 ¼ cups (175 g) gluten-free flour blend — tested with Bob’s Red Mill 1-to-1
For the lemon glaze:
- 1 cup (120 g) powdered sugar
- 3 tablespoons (45 g) fresh lemon juice
- 1 teaspoon (2 g) lemon zest
Use the photos above to follow the visual steps.
Instructions
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Preheat and prep pan. Preheat oven to 350°F. Line an 8×8-inch square pan with parchment, leaving an overhang for easy removal.
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Infuse the sugar. Combine 1 cup granulated sugar and 3 tablespoons lemon zest in a bowl. Rub the zest into the sugar for 1–2 minutes until moist and pale yellow.
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Mix in butter. Pour ¾ cup melted unsalted butter into the lemon sugar and whisk 1–2 minutes until smooth.
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Add wet ingredients. Whisk in 2 large eggs, 2 tablespoons fresh lemon juice, ¾ teaspoon lemon extract, and 1 teaspoon salt until combined.
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Add the flour. Fold in 1¼ cups gluten-free flour with a spatula until no streaks remain. The batter will be thick — do not overmix.
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Bake. Spread batter in the prepared pan and bake at 350°F for 22–25 minutes. A toothpick should come out with a few moist crumbs.
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Cool completely. Let brownies cool in the pan on a wire rack until fully cool, about 1–2 hours. Cooling intensifies the lemon flavor.
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Make the glaze. Whisk 1 cup powdered sugar with 3 tablespoons fresh lemon juice and 1 teaspoon zest until smooth and pourable.
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Glaze and serve. Pour glaze over cooled brownies, spread to the edges, and let set 30 minutes at room temperature (or 15 minutes refrigerated). Lift from pan using the parchment and cut into 16 squares.
Notes
- Gluten-Free: This recipe was tested with Bob’s Red Mill 1-to-1 Gluten-Free Baking Flour (blue bag) that contains xanthan gum. Other blends may yield different results.
- Measuring Flour: For best texture, weigh the flour (about 175 g) instead of scooping with cups.
- Storage: Store in an airtight container at room temperature up to 3 days (best on day 2). Freeze for up to 3 months after flash-freezing on a sheet pan.
Nutrition
