Classic Vegan Lemon Bars pair melt-in-your-mouth shortbread with a silky lemon custard bursting with fresh citrus flavor. A dusting of powdered sugar adds just enough sweetness to every luscious, lemony bite. And yes, they're made without eggs or dairy.
A great lemon bar is all about contrast. The crust should be lightly sweet with the delicate texture of a classic shortbread cookie. It's firm enough to hold the filling, yet tender enough to melt away with each bite. The smooth lemon custard brings a refreshing tartness and unmistakable fresh lemon flavor.
These lemon bars are a wonderful make-ahead dessert for holidays, parties, showers, potlucks, or an afternoon with friends. Once chilled, they cut neatly into squares and are easy to serve and share. If you love fresh lemon desserts, you might also enjoy my Lemon Drop Cookies and Lemon Blueberry Bread.
I've always had a soft spot for lemon desserts, and these bars were worth every round of testing. I wasn't trying to reinvent a classic. I simply wanted all the things people love about traditional lemon bars: a delicate shortbread crust, a silky filling that slices beautifully, and plenty of bright lemon flavor without being overly tart. Once I had the flavor, texture, and consistency just right, I knew this was the recipe I wanted to share.
Table of Contents
Why this recipe works
Not all lemon bars are created equal. Here's what makes this recipe special.
✔️ A true shortbread crust
Powdered sugar gives the crust its delicate, shortbread texture. It bakes firm enough to hold the filling without becoming too hard.
✔️ A silky, buttery lemon filling
Cornstarch sets the filling without eggs. Dairy-free butter whisked in after cooking adds richness and creates a smooth, satiny texture.
✔️ Bright lemon flavor, thoughtfully balanced
Fresh lemon juice provides vibrant citrus flavor. A small amount of zest enhances the aroma without introducing unwanted bitterness.
✔️ Creamy without relying on coconut milk
Cashew or soy milk provides creaminess while allowing the fresh lemon flavor to shine.
Ingredients
The shortbread and lemon filling use familiar baking staples, with fresh lemons providing the signature flavor.
See the printable recipe card below for quantities & details
For the shortbread crust
All-purpose flour - Provides the structure for the shortbread. Measure the flour carefully so the crust stays tender rather than dry or dense.
Powdered sugar - Gives the crust a delicate texture and light sweetness. Unlike granulated sugar, it blends smoothly into the dough and helps create that melt-in-your-mouth shortbread texture.
Vegan butter - Provides the rich flavor and tender texture we expect from shortbread. I often use Earth Balance Buttery Spread with good results. Stick-style vegan butter also works well and makes measuring by tablespoons especially convenient if you don't own a kitchen scale.
Salt - Balances the sweetness and enhances the flavor of the crust.
For the lemon filling
Fresh lemon juice - Freshly squeezed juice provides the tart, unmistakable lemon flavor at the heart of this recipe. I wouldn't substitute bottled lemon juice here.
Lemon zest - You'll only need a small amount. Zest the lemons before squeezing them for juice.
Granulated sugar - Sweetens the filling and balances the natural acidity of the lemon juice.
Cornstarch - This is our primary thickener. It allows the lemon filling to set without eggs while maintaining a smooth, custard-like consistency.
Plant-based milk - I use plain, unsweetened cashew milk for its creamy texture and neutral flavor. Soy milk is another good option. Choose a creamy, pale-colored milk to preserve the filling's sunny yellow hue. Thin varieties, such as rice milk, may produce a softer consistency. Coconut milk can provide good creaminess, but its flavor may come through in the finished bars.
Vegan butter - Stirred into the filling after cooking, rather than cooked with the other ingredients. This small addition gives the filling richness and contributes to its silky texture.
Turmeric - Just a tiny amount enhances the natural yellow color. Less is definitely more here. You can omit it if you prefer.
How to make classic vegan lemon bars
These bars require several steps, including baking, stovetop cooking, cooling, and chilling. Give yourself enough time to let each stage do its job.
1. Prepare the pan
Preheat the oven to 350℉. Line an 8 x 8-inch baking dish or pan with parchment paper. Leave enough parchment extending over the sides to create handles. You'll use them later to lift the chilled bars from the pan.
2. Make the shortbread crust
Combine the flour, powdered sugar, and salt.
Gradually add the dry ingredients to the melted vegan butter and mix until a soft dough forms.
Try not to overwork it. The dough will be thick and maybe a bit crumbly.
Using your hands, an angled spatula, or mini rolling pin, press the dough evenly into the parchment-lined baking pan. Make sure the corners and edges have an even layer of crust. Use a fork to poke a few holes in the crust. This technique, called docking, allows steam to escape while baking.
3. Pre-bake the crust
Bake at 350℉ until the surface looks dry and the edges are lightly golden. This usually takes about 18-20 minutes. The crust should be fully pre-baked before adding the lemon filling.
4. Make the lemon filling
In a medium saucepan, whisk the sugar, cornstarch, and turmeric together before adding the other ingredients. This helps prevent lumps. Next, add the milk, lemon juice, and zest. Stir until fully combined.
Place the saucepan over medium-low heat and whisk continuously as the filling heats. Continue whisking as it begins to bubble and thicken. This usually takes about 3-5 minutes. The finished filling should resemble a soft, pourable pudding.
Remove the saucepan from the heat. Whisk in the cold butter, about one tablespoon at a time, until fully melted and incorporated.
Pour the warm lemon filling over the warm pre-baked crust. Spread it evenly to the edges and corners.
5. Final baking
Return the pan to the oven and bake another 12-15 minutes at 350℉. Remove from the oven when the filling is firm around the edges, glossy on top, and slightly soft in the middle.
6. Cool and chill
Allow the bars to cool completely before refrigerating. Chill thoroughly before removing from the pan. Refrigerate for at least 4 hours, or preferably overnight. The filling will set firmer as it cools.
Lift the chilled slab from the pan using the parchment paper. Cut into squares or rectangles with a sharp knife. Finish with a light dusting of powdered sugar just before serving.
Expert tips for the best vegan lemon bars
Use fresh lemons. Freshly squeezed juice gives the filling its clean, distinctive flavor. Bottled juice won't provide the same result.
Measure the cornstarch carefully. Cornstarch determines how firmly the filling sets. Too little can leave it soft. Too much can create a gummy texture.
Don't overdo the zest. Zest only the thin yellow peel, avoiding the bitter white pith underneath. A microplane makes quick work of finely zesting lemons.
Keep whisking. Whisk the filling continuously as it cooks to prevent lumps and scorching. Pay attention to the bottom and corners of the saucepan.
Watch the filling, not just the clock. It should become smooth and noticeably thick before you remove it from the heat.
Add the vegan butter last. Remove the filling from the heat before whisking in the butter. This adds richness and helps create its smooth, satiny finish.
Dock the crust. Use a fork to poke a few holes in the dough before baking the shortbread crust. It allows steam to escape and prevents the crust from bubbling up or lifting from the bottom of the pan while baking.
Wait to add the powdered sugar. Dust the bars shortly before serving. A sifter makes it easy to apply a light, even dusting.
Storage & Serving
Refrigerating
Store lemon bars covered in the refrigerator for 3-5 days. They're best enjoyed within the first three days. After three days, the shortbread gradually absorbs moisture from the filling. The bars are still good, but the crust will begin to soften.
Freezing
Cut the chilled lemon bars into individual squares before freezing. Place them in a covered freezer-safe container or freezer bags. Thaw the bars in the refrigerator before serving. Add the powdered sugar after thawing for the best appearance.
Serving
Serve the bars chilled. The filling softens as it warms, so don't leave them at room temperature for extended periods. For clean squares, cut the bars while they're cold. Use a sharp knife and wipe the blade between cuts.
Transporting
Transport lemon bars chilled in a covered container. It's best to place the container in an insulated cooler with ice packs. Keep them out of direct sunlight and hot cars. Excessive heat can soften the filling considerably.
Frequently asked questions
Yes. These bars are particularly well suited for making ahead because they require several hours of chilling. Prepare them the day before and refrigerate overnight.
Cooking activates the cornstarch and thickens the filling before it goes into the oven. This helps create a smooth custard-like filling that sets without eggs.
The filling may not have cooked long enough to fully activate the cornstarch. Accurate measurements are important, too. The bars need to chill completely before slicing. The filling continues to firm as it cools.
Recipe
Classic Vegan Lemon Bars
Equipment
- 1 8 x 8-inch baking dish or pan
- 1 whisk
- 1 silicone spatula
- 1 Parchment paper
- 1 Large mixing bowl
- 1 zester or microplane
Ingredients
Shortbread Crust
- ⅝ cup vegan butter, melted same as ½ cup + 2 tablespoons
- ⅓ cup powdered sugar
- 1¼ cups all-purpose flour
- ¼ teaspoon salt
Lemon Filling
- ⅔ cup fresh lemon juice about 6-8 lemons
- 2 teaspoons lemon zest finely grated
- 1¼ cups unsweetened plant-based milk cashew or soy milk preferred
- 1½ cups granulated sugar
- 6 tablespoons cornstarch
- ¹/₁₆ teaspoon turmeric a tiny pinch for color
- 2 tablespoons vegan butter cold - cut into small pieces
Instructions
Prepare the Pan
- Preheat the oven to 350°F (175°C).
- Line an 8-inch square baking dish or pan with parchment paper. Leave enough overhang on two sides to lift out the bars.
Make the Shortbread Crust
- Mix together the powdered sugar, flour, and salt in a medium mixing bowl.
- Gradually stir in the melted butter until combined and a thick dough forms. It's ok if the dough is a bit crumbly.
- Transfer the dough to the parchment lined pan. Press the dough evenly across the bottom and into the corners. Use a fork to poke a few holes (also known as docking) across the bottom to prevent the crust from bubbling up or lifting from the pan while baking.
- Bake until the surface looks dry and the edges are lightly golden, about 18-20 minutes.
- Remove the crust from the oven. Leave the oven set at 350°F while you prepare the filling.
Make the Lemon Filling
- Whisk the sugar, cornstarch, and turmeric together in a medium saucepan. Breaking up the cornstarch now helps prevent lumps later.
- Gradually whisk in the milk until completely smooth.
- Add the lemon juice and lemon zest. Whisk again until thoroughly combined.
- Place the saucepan over medium-low heat. Cook while whisking continuously, reaching into the bottom and corners of the pan.
- The mixture will begin to thicken and bubble as it heats. Continue whisking until it becomes smooth and resembles a thick custard. The total stovetop cooking time usually takes about 3-5 minutes, depending on your stove and saucepan. Watch the consistency rather than relying only on time.
- Remove the saucepan from the heat as soon as the filling is fully thickened.
- Immediately add the cold butter pieces. Whisk until the butter has completely melted and the filling looks smooth and satiny.
Fill and Bake
- Pour the hot lemon filling over the warm, pre-baked shortbread crust.
- Gently spread the filling into an even layer, working it into the corners without disturbing the crust.
- Bake at 350°F for 12-15 minutes. Remove the bars when the filling is firm around the edges, glossy on top, and slightly soft in the center.
- Remove the pan from the oven. Place it on a cooling rack and allow the bars to cool completely. The filling will continue to set as it cools and chills.
Chill, Cut, and Finish
- Once completely cool, lightly cover the pan with parchment paper and refrigerate until thoroughly chilled and firm.
- Chill for at least 4 hours. For best results, refrigerate overnight before cutting.
- Use the parchment overhang to carefully lift the chilled slab from the pan.
- Cut into squares with a sharp knife. Wipe the knife clean between cuts for smooth, neat edges.
- Lightly dust the bars with powdered sugar shortly before serving.
Notes
Nutrition
These are estimated values generated from a nutritional database using unbranded products. Please do your own research with the products you're using if you have a serious health issue or are following a specific diet.
Connie Edwards McGaughy says
I really love how these lemon bars turned out. The tender shortbread, silky filling, and fresh lemon flavor have just the right balance of sweet and tart. They took a few rounds of testing to get just right, and I must say - I'm delighted with the results.🍋 I hope you give it a try!