I can’t get over how these Lemonies pack all the dense, fudgy richness of brownies into a bright, tangy lemon dessert with the glossiest glaze. One bite and it’s obvious why they’re breaking the internet.

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I’m fully obsessed with these lemon brownies because they hit that wild spot between dense, fudgy brownie and sharp, bright lemon bar. Not cakey.

Not shy. Just thick, chewy lemonies with a glossy glaze that cracks a little when I bite in.

I love how the fresh lemon juice cuts through the sweetness, while the lemon zest makes every square taste loud in the best way. And yes, I keep sneaking corner pieces straight from the pan.

But the middle pieces? Ridiculous.

If I want a dessert that feels viral for an actual reason, this is the one I’m grabbing.

Ingredients

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Melted butter makes these brownies rich, soft, and a little fudgy.
Granulated sugar brings sweetness and helps create that tender, shiny top.
Eggs hold everything together and give the brownies a smooth bite.
Vanilla softens the lemon’s sharp edge so it doesn’t taste too sour.
Lemon zest is where the big, fresh lemon flavor really shows up.
Fresh lemon juice adds that bright tang you’ll want in every bite.
Flour gives the brownies structure without making them cakey or dry.
Baking powder adds just enough lift to keep things from feeling heavy.
Sea salt balances the sweet stuff and makes the lemon pop.
Powdered sugar looks pretty on top and adds a sweet, snowy finish.
Confectioners sugar makes the glaze smooth, thick, and bakery-style.
Plus, lemon juice in the glaze keeps it zingy instead of just sweet.
Basically, extra zest in the glaze makes the whole pan taste brighter.

Ingredient Quantities

1 cup unsalted butter, melted and slightly cooled

1 1/2 cups granulated sugar

2 large eggs, room temperature

1 teaspoon vanilla extract

Zest of 2 large lemons (about 2 tablespoons)

1/3 cup fresh lemon juice, strained

1 cup all purpose flour, spooned and leveled

1/4 teaspoon baking powder

1/4 teaspoon fine sea salt

1/2 cup powdered sugar, for dusting if desired

For the glaze: 1 1/2 cups confectioners sugar, sifted

For the glaze: 3 to 4 tablespoons fresh lemon juice, adjust for consistency

For the glaze: 1 teaspoon lemon zest, optional for extra brightness

How to Make this

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1. Preheat oven to 350°F (175°C). Line an 8×8 inch baking pan with parchment paper, leaving an overhang for easy removal, and lightly grease the sides.

2. In a large bowl whisk melted and slightly cooled butter with granulated sugar until smooth and glossy.

3. Add eggs one at a time, whisking well after each, then stir in vanilla extract, lemon zest, and the strained lemon juice until fully incorporated.

4. In a separate bowl whisk together all purpose flour, baking powder, and fine sea salt.

5. Gently fold the dry ingredients into the wet mixture just until combined, taking care not to overmix. Batter will be thick and glossy.

6. Pour batter into the prepared pan, spread evenly, and smooth the top.

7. Bake 22 to 28 minutes or until the edges are set and a toothpick inserted near the center comes out with a few moist crumbs but not wet batter. Cool completely in the pan on a wire rack.

8. While brownies cool, make the glaze by whisking sifted confectioners sugar with 3 tablespoons fresh lemon juice, adding up to 1 more tablespoon if needed to reach a pourable but thick consistency; stir in optional lemon zest.

9. Remove cooled brownies using the parchment overhang, place on a cutting board, pour or spread the glaze evenly over the top, allow glaze to set, then dust with powdered sugar if desired and cut into squares.

Equipment Needed

1. Oven preheated to 350°F and an 8×8 inch baking pan lined with parchment paper
2. Parchment paper and cooking spray or softened butter for greasing the pan
3. Large mixing bowl and medium mixing bowl
4. Whisk and rubber spatula (or flexible silicone spatula)
5. Measuring cups and spoons
6. Microplane zester and citrus juicer plus small fine mesh strainer for lemon juice
7. Sifter or fine mesh sieve for confectioners sugar
8. Wire cooling rack and a toothpick or cake tester
9. Sharp knife and cutting board for slicing squares

FAQ

Q: Can I use bottled lemon juice instead of fresh? A: Fresh lemon juice is best for brightness and acidity, but if needed use high quality bottled juice; you may need slightly less because it can be milder.

Q: How do I know when the lemon brownies are done? A: The edges should be set and lightly golden while the center still looks slightly moist. A toothpick inserted in the center should come out with a few moist crumbs but not wet batter.

Q: Can I swap the butter for oil or a dairy-free alternative? A: You can use neutral oil (vegetable or canola) for a moister texture, but flavor will change. For dairy-free, use a vegan butter substitute measured 1 to 1 and ensure it is melted and slightly cooled.

Q: How should I store these brownies and how long will they keep? A: Store in an airtight container at room temperature for up to 3 days. Refrigerate up to 7 days if you prefer them chilled. Bring to room temp before serving for best flavor.

Q: Can I freeze the brownies or the glaze? A: Yes. Freeze unglazed, cooled bars wrapped tightly for up to 3 months. Thaw overnight in the refrigerator or at room temperature. Make and store glaze in the fridge for up to 5 days; whisk before using.

Q: How can I make these gluten free? A: Replace the all purpose flour with a 1 to 1 gluten free baking blend that contains xanthan gum. Check baking powder is gluten free. Texture may be slightly different but flavor remains bright.

Best Lemon Brownies Recipe Substitutions and Variations

Unsalted butter: substitute equal amount coconut oil (mild flavor) or neutral vegetable oil; reduce oven time slightly if using oil for a moister texture.
All purpose flour: substitute a 1-to-1 gluten free baking blend (make sure it contains xanthan gum) for a similar crumb.
Large eggs: substitute each egg with 1 tablespoon ground flaxseed mixed with 3 tablespoons water (let sit 5 minutes) or 1/4 cup unsweetened applesauce for a denser, fudgier result.
Confectioners sugar for glaze: substitute homemade powdered sugar by pulsing 1 cup granulated sugar with 1 tablespoon cornstarch in a blender until very fine; sift before using and adjust lemon juice for desired consistency.

Pro Tips

1. Bring the eggs and lemon juice to room temperature before you start. Warm ingredients incorporate more easily and give a silkier batter and more even rise.

2. Grate only the yellow part of the lemon rind for the zest. The white pith tastes bitter and can make the bars harsh. Microplane the zest directly over the mixing bowl so you capture all the fragrant oils.

3. Measure the flour by spooning it into the cup and leveling with a knife. Too much flour will make the bars dense and dry, which fights the bright lemon flavor.

4. Don’t rush cooling. Let the bars cool completely in the pan before glazing so the lemon icing stays glossy instead of seeping into the crumb. If you need to speed it up, place the pan on a wire rack over a shallow ice bath in the sink for a few minutes, then finish cooling at room temperature.

5. Tweak the glaze for balance and texture. Add lemon juice slowly until it pours but is still thick enough to hold some shape on top. If it tastes too tart, stir in a pinch of powdered sugar; if it is too sweet, a tiny pinch of fine sea salt will brighten it up. Store cut bars in an airtight container at room temperature for up to 2 days or refrigerate for longer storage.

Best Lemon Brownies Recipe

Recipe by Samantha Dalling

0.0 from 0 votes

Servings

servings

Calories

347

kcal

Equipment: 1. Oven preheated to 350°F and an 8×8 inch baking pan lined with parchment paper
2. Parchment paper and cooking spray or softened butter for greasing the pan
3. Large mixing bowl and medium mixing bowl
4. Whisk and rubber spatula (or flexible silicone spatula)
5. Measuring cups and spoons
6. Microplane zester and citrus juicer plus small fine mesh strainer for lemon juice
7. Sifter or fine mesh sieve for confectioners sugar
8. Wire cooling rack and a toothpick or cake tester
9. Sharp knife and cutting board for slicing squares

Ingredients

1 cup unsalted butter, melted and slightly cooled
1 1/2 cups granulated sugar
2 large eggs, room temperature
1 teaspoon vanilla extract
Zest of 2 large lemons (about 2 tablespoons)
1/3 cup fresh lemon juice, strained
1 cup all purpose flour, spooned and leveled
1/4 teaspoon baking powder
1/4 teaspoon fine sea salt
1/2 cup powdered sugar, for dusting if desired
For the glaze: 1 1/2 cups confectioners sugar, sifted
For the glaze: 3 to 4 tablespoons fresh lemon juice, adjust for consistency
For the glaze: 1 teaspoon lemon zest, optional for extra brightness

Directions

Preheat oven to 350°F (175°C). Line an 8×8 inch baking pan with parchment paper, leaving an overhang for easy removal, and lightly grease the sides.
In a large bowl whisk melted and slightly cooled butter with granulated sugar until smooth and glossy.
Add eggs one at a time, whisking well after each, then stir in vanilla extract, lemon zest, and the strained lemon juice until fully incorporated.
In a separate bowl whisk together all purpose flour, baking powder, and fine sea salt.
Gently fold the dry ingredients into the wet mixture just until combined, taking care not to overmix. Batter will be thick and glossy.
Pour batter into the prepared pan, spread evenly, and smooth the top.
Bake 22 to 28 minutes or until the edges are set and a toothpick inserted near the center comes out with a few moist crumbs but not wet batter. Cool completely in the pan on a wire rack.
While brownies cool, make the glaze by whisking sifted confectioners sugar with 3 tablespoons fresh lemon juice, adding up to 1 more tablespoon if needed to reach a pourable but thick consistency; stir in optional lemon zest.
Remove cooled brownies using the parchment overhang, place on a cutting board, pour or spread the glaze evenly over the top, allow glaze to set, then dust with powdered sugar if desired and cut into squares.

Notes

Below you’ll find my best estimate of this recipe’s nutrition facts. Treat the numbers as a guide rather than a rule—great food should nourish both body and spirit. Figures are approximate, and the website owner assumes no liability for any inaccuracies in this recipe.