The Best Lemon Bars Recipe (Gluten-Free!)

There’s a reason lemon bars show up at every spring potluck, bake sale, and Easter table — that perfect balance of buttery shortbread and bright, tangy lemon filling is impossible to resist. This lemon bars recipe is the one I keep coming back to after testing more batches than I can count, and it’s become one of the most requested desserts in our house of 7.

What makes this version stand out is the thick, luscious lemon layer — no thin, wimpy filling here. It sits on a buttery shortbread crust that holds its own without getting soggy or crumbling apart when you slice it.

And here’s the bonus: this recipe is naturally gluten-free, made with a simple gluten-free flour swap that doesn’t sacrifice an ounce of that classic shortbread texture. Whether you’re gluten-free or just looking for the best lemon bars recipe, period, this one delivers.

Have a sweet tooth but not a big fan of lemon? My yummy raisin date bars can be made gluten-free, too – check them out!

Why You’ll Love These Lemon Bars

• Thick, luscious lemon layer – if you LOVE lemon, you are going to appreciate the thick, tart layer filled with lemon flavor.
• Buttery shortbread crust – sturdy enough to hold filling, tender enough to melt in your mouth
• just 7 simple ingredients – don’t you love it when a recipe is actually made up of ingredients you likely have in your pantry already? Me too!
• Crowd pleaser – it’s hard to find a dessert that everyone will love, but this may be as close as it gets!
• Easy to double the recipe – this recipe will be gobbled up fast; I always recommend doubling the recipe if you are trying to feed a large family.
• Simple to make – most importantly, these gluten-free lemon bars are easy to make. If you have never made lemon bars from scratch, you’ll be plesantly surprised at just how simple it is!

Ingredients

This gluten-free lemon bar recipe will soon become a new family favorite. Here’s how to whip up a batch — or two — of your own.

Lemon bars can be finicky with ingredient substitutions – this recipe is best when both the ingredients and directions are followed exactly. 

Shortbread Layer

• butter
• flour or gluten free flour (I use King Arthur Gluten-free Flour) 
• granulated sugar

Lemon Layer:

• eggs
• sugar
• baking powder
• gluten-free flour
• lemon juice*
• powdered sugar for dusting the top

*cooking note: freshly squeezed lemon juice will give you the absolute best lemon flavor, but I often use bottled lemon juice to save time and these bars are still delicious.

Equipment You Need:

• 8×8” glass or ceramic baking dish (do not use metal as it can react with the acidity in the lemon juice and can cause an odd, metallic taste)
• stand mixer with both regular paddle attachment and whisk attachment or hand mixer
• measuring cups
• for fresh lemon juice – this citrus squeezer makes it quick and easy to squeeze fresh lemon juice
• spatula
• sifter, optional but recommended for dusting the powdered sugar

How to Make Gluten-Free Lemon Bars

First up, preheat your oven to 350°F and prep your pan — grease an 8×8″ glass or ceramic baking dish, or line it with parchment paper for easy removal later. (Quick tip: skip metal pans here, since the acidity in the lemon juice can react with metal and leave an odd taste.)

For the shortbread layer, mix the melted butter and sugar together, then stir in the gluten-free flour until just combined.

Press the mixture evenly into your prepared pan — clean fingers work great for this, or use the back of a spoon.

Bake for 18-22 minutes, just until the edges start to turn golden. Pull it out and set it aside.

While the crust bakes, whip up the lemon filling. Beat the eggs first, then add the sugar, baking powder, and flour, scraping down the sides so everything’s well combined.

With your mixer running, slowly pour in the lemon juice and beat until the mixture looks light and frothy.

Turn your oven down to 325°F, then pour the lemon filling right over the warm, just-baked shortbread layer. Don’t stress if your crust cools a bit while you’re finishing the filling — just add a few extra minutes to the bake time if needed.

Bake for 22-28 minutes, until the top is just turning golden and the center is set — give the pan a gentle tap and it shouldn’t jiggle. Keep a close eye near the end, since these bars can brown quickly if the oven runs a little hot.

Once they’re done, let the bars cool completely on a wire rack before dusting with powdered sugar (a fine-mesh sifter makes this easy, and it also helps hide any imperfections on top).

One important note: resist the urge to test these with a toothpick or fork. The filling needs time out of the oven to fully set, so if you wait for a “clean” toothpick, you’ll end up overbaking them.

For the best texture, let the bars cool fully — ideally overnight — before slicing. They’re still delicious warm, just softer and best eaten with a fork. I promise it’s worth the wait!

Storage

Room temperature: These lemon bars keep beautifully at room temperature for 4-5 days in a sealed container, though in our house they rarely last past day two.

Refrigerator: If you prefer them chilled or live somewhere warm, they’ll keep in the fridge for up to a week.

Freezer: These freeze wonderfully. Skip the powdered sugar dusting before freezing, then let the bars cool completely — 12-24 hours is ideal — before slicing. Freeze the bars in a single layer on a parchment-lined tray for 1-2 hours, then wrap each one individually in plastic wrap and store in a freezer bag or container for up to 3 months.

To thaw: Move them to the fridge to thaw, then dust with powdered sugar right before serving.

I know your family will love these delicious lemon bars as much as we do! Enjoy!

Tips & Tricks for the Best Lemon Bars

Getting the Filling Just Right

Don’t skip the frothy-beating step for the lemon layer — it helps create that smooth, set texture once baked.

Avoiding Overbaked Bars

Watch the last few minutes closely. These bars go from perfectly golden to overdone fast, especially if your oven runs hot.

Getting Clean Slices

Let the bars cool completely (overnight is best) before cutting, and use a sharp knife wiped clean between cuts for neat, bakery-style edges.

More Gluten-Free Desserts

• Gluten-Free Sugar Cookies
• Bakery-Style Gluten-Free Blueberry Muffins
• The Best Gluten-Free Chocolate Chip Cookies
• Chewy Gluten-Free Peanut Butter Cookies

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