Tangy Dairy Free Lemon Bars with a Buttery Shortbread Crust

These dairy free lemon bars have a crisp, buttery shortbread crust and a luscious, puckery lemon curd filling that sets up beautifully without a drop of dairy. They taste just like the classic you remember, only plant-based butter does the heavy lifting.

The recipe comes together with pantry staples and about 20 minutes of hands-on work. The hardest part is waiting for them to cool before you slice into that bright, sunny tray.

Why This One Stays in the Rotation

The crust stays tender and sandy, never greasy, because dairy free butter sticks behave almost exactly like the real thing in a shortbread. It holds its shape and browns lightly around the edges.

The filling is nothing more than eggs, sugar, fresh lemon juice, and zest. No milk, no cream, no weird thickeners. It bakes into a custard that jiggles just a little then firms up into a silky sliceable layer once it cools.

Dusted with a cloud of powdered sugar at the end, these bars hit every note: buttery base, tart citrus, and a clean, sweet finish.

Ingredients

• 1/2 cup (1 stick) dairy free butter, softened: use a good quality stick like Miyoko’s or Earth Balance sticks, not a soft spread
• 1 cup all-purpose flour: spooned and leveled, not scooped
• 1/4 cup granulated sugar: for the crust
• 1/4 teaspoon fine sea salt: brings out the buttery flavor
• 3 large eggs, at room temperature: cold eggs can make the filling seize
• 1 cup granulated sugar: for the filling
• 1/2 cup fresh lemon juice: from about 3 to 4 lemons
• 2 tablespoons lemon zest: zest the lemons before juicing them
• Powdered sugar, for dusting: about 2 tablespoons, sifted

Variations / Substitutions

• Gluten free: swap the all-purpose flour for a 1:1 gluten free blend. The crust will be a bit more fragile, but still buttery.
• Make it refined sugar free: use coconut sugar in both the crust and filling. The bars will be darker and the lemon flavor will taste a little deeper and more caramel-like.
• Use key limes or Meyer lemons: both work beautifully. Key limes give a sharper, floral punch, while Meyer lemons need less sugar to balance their sweetness.
• Add a berry swirl: drop 2 tablespoons of raspberry or blueberry puree onto the filling before baking and swirl with a toothpick. It bakes into a pretty ribbon of color and a bit of fruit flavor.

For another dairy free citrus dessert, try our Dairy Free Orange Olive Oil Cake.

How to Make Dairy Free Lemon Bars

Step 1: Mix the Shortbread Dough

Preheat your oven to 350°F (175°C) and line an 8×8-inch baking pan with parchment paper, leaving a little overhang on two sides to lift the bars out later. In a medium bowl, beat the 1/2 cup softened dairy free butter and 1/4 cup granulated sugar with a hand mixer until light and fluffy, about 2 minutes.

Add the 1 cup flour and 1/4 teaspoon salt, then mix on low just until the dough comes together and resembles wet sand. It should clump when you press it between your fingers.

Step 2: Press the Crust and Prebake

Scrape the dough into the prepared pan and press it into an even layer with your fingertips or the back of a measuring cup. You want it really compact and smooth so it bakes into a sturdy base.

Bake the crust on the center rack until the edges just start to turn golden, about 15 to 18 minutes. The center may look pale, but that’s fine. It will continue to set as it cools.

Step 3: Whisk the Lemon Filling

While the crust bakes, make the filling. In a large bowl, whisk together the 3 room temperature eggs and 1 cup granulated sugar until the mixture is pale and slightly thick, about 1 minute. Stir in the 1/2 cup fresh lemon juice and 2 tablespoons lemon zest.

Keep the whisk gentle. You are not looking for a frothy foam, just a smooth, sunny custard. Too much air can cause the top to bubble as it bakes.

Step 4: Bake the Bars

When the crust comes out of the oven, give the filling one more quick stir, then pour it right over the hot crust. The heat helps the custard start setting from the bottom up.

Slide the pan back into the oven and bake until the filling is just set with a faint wobble in the center, about 20 to 25 minutes. It will look glossy and may puff up a little at the edges. A toothpick inserted near the edge should come out clean, while the very center will still look a bit wet.

Step 5: Slice and Serve the Bars

Remove the pan from the oven and let the bars cool completely on a wire rack, about 1 hour. For the neatest squares, transfer the pan to the refrigerator and chill for at least 2 hours. The filling firms up into a creamy, sliceable layer.

Use the parchment overhang to lift the whole block onto a cutting board. Sift a generous layer of powdered sugar over the top, then slice into 9 squares with a sharp knife, wiping the blade between cuts for clean edges.

Tips for Clean, Tangy Lemon Bars

• Press the crust firmly: use the flat bottom of a measuring cup to pack it down. Any loose spots will crumble when you cut.
• Use room temperature eggs: they blend smoothly and help the filling stay silky. If you forget, set them in a bowl of warm water for 5 minutes.
• Chill before slicing: the bars need that fridge time to fully set. It is the difference between neat squares and a gooey mess.
• Watch the edges of the crust: if they start to brown too fast as the filling bakes, tent a piece of foil loosely over the pan. The filling will still cook through without burning the crust.

Bake times by pan size:

Storing Leftover Lemon Bars

Store the bars in an airtight container in the refrigerator for up to 5 days. They taste even better after a day once the lemon flavor settles. For longer storage, freeze the sliced bars in a single layer on a baking sheet until solid, then transfer to a freezer bag. They keep for up to 2 months. Thaw overnight in the fridge.

Frequently Asked Questions

Why did my crust shrink away from the sides?

The dough may have been too warm or overworked. Press it into the pan gently without kneading, and if your kitchen runs hot, chill the lined pan for 10 minutes before baking. A little shrinkage does not hurt the bars.

My filling bubbled while baking. What went wrong?

A few small bubbles are normal, but if the whole top looks frothy, your oven likely runs a bit hot. Try reducing the temperature by 25°F next time and bake the bars on a lower rack, away from the top heating element.

Can I make this without an electric mixer?

Yes. Mix the crust by hand with a sturdy spoon, and whisk the filling vigorously until the sugar is fully dissolved. It takes a little more elbow grease, but the result is the same.

Is it really necessary to sift the powdered sugar?

Sifting keeps the sugar from clumping and gives you that snow-dusted look. If you do not have a sifter, just press the sugar through a fine mesh sieve with the back of a spoon. It takes ten seconds.

Tangy Dairy Free Lemon Bars Recipe

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Prep Time 20 minutes mins

Cook Time 35 minutes mins

Total Time 55 minutes mins

Servings: 9 servings

Calories: 270

Ingredients Method Notes

Ingredients

  

• 1/2 cup (1 stick) dairy free butter, softened
• 1 cup all-purpose flour
• 1/4 cup granulated sugar (for crust)
• 1/4 teaspoon fine sea salt
• 3 large eggs, at room temperature
• 1 cup granulated sugar (for filling)
• 1/2 cup fresh lemon juice
• 2 tablespoons lemon zest
• Powdered sugar, for dusting

Method

 

1. Preheat oven to 350°F. Line an 8×8-inch pan with parchment. Beat dairy free butter and 1/4 cup sugar until fluffy. Mix in flour and salt until a dough forms.
2. Press dough evenly into pan. Bake 15 to 18 minutes until edges are lightly golden.
3. Whisk eggs and 1 cup sugar until pale, then stir in lemon juice and zest until smooth.
4. Pour filling over hot crust. Bake 20 to 25 minutes until set with a slight jiggle in the center.
5. Cool completely on a rack, then refrigerate at least 2 hours. Lift out, dust with powdered sugar, and slice into squares.

Notes

The bars need to chill for at least 2 hours after baking to set up properly, so plan ahead. That time is not counted in the prep or cook time. For a slightly softer, more custard-like center, pull the bars from the oven when the jiggle is still a little loose.