Best Ever Lemon Bars with Buttery Shortbread Crust

Take these lemon bars to your next gathering, and watch them vanish—they’re bursting with bright lemon flavor, buttery goodness, and just the right mix of tangy and sweet.

Whenever the sunshine starts calling—or I just need a bright, cheerful treat—I reach for this classic lemon bars recipe. The buttery shortbread crust combined with the zesty, tangy lemon layer is like a little slice of sunshine you can keep in your fridge or freezer for whenever that citrus craving hits.

These bars are also surprisingly simple to whip up. You’ll need just eight ingredients—chances are you have most of them in your pantry right now. And here’s a little insider tip: adding a bit of cornstarch to the crust gives it a super tender, crisp bite, a neat trick I picked up from pastry chefs.

Plus, these lemon bars freeze and keep wonderfully, making them a perfect make-ahead treat for potlucks, picnics, or anytime you want something fresh and delicious.

“Simply the best lemon bars you’ll ever eat.”

These lemon bars are bright, buttery, and hit the perfect level of tartness—my go-to whenever I want a simple, sunny dessert. The buttery, tender shortbread crust pairs beautifully with a smooth, lemony topping. This recipe is both easy to make and store, and once you try them, they’ll be impossible to forget.

Here, you’ll find everything needed to make a 9×13 pan (around 20 squares): a straightforward ingredient list with just eight easy-to-find items, step-by-step photos, and even a video tutorial. I’ll reveal the pastry chef’s secret for a crisp yet tender crust (spoiler: it’s cornstarch), plus tips to avoid common pitfalls, advice for slicing perfectly, and suggestions for make-ahead and freezer-friendly prep. Also, I’ll share some fun variations so you can make these bars your own!

Why You’ll Love These Bars

These lemon bars nail that perfect combo: a classic shortbread crust that’s tender and crisp thanks to a tiny bit of cornstarch, topped with a luscious, vibrant lemon layer that’s tart and sweet in all the right ways. The recipe’s simplicity—with just eight common ingredients—and that special crust trick make them a winner every time.

What I love is how well they keep, too. Whether you’re planning ahead for a party, potluck, or just stocking your freezer, these bars hold up beautifully and travel like champs.

Ingredients and Key Notes

• 1¾ cups all-purpose flour, spooned into measuring cup and leveled-off
• ¼ cup cornstarch
• 1 teaspoon salt
• 1 cup confectioners’ sugar, plus more to decorate finished bars
• 1 cup (2 sticks) cold unsalted butter, cut into ½-in (13-mm) pieces
• 6 large eggs
• 3 cups granulated sugar
• 2 tablespoons lemon zest (be sure to zest the lemons before juicing)
• ⅔ cup freshly squeezed lemon juice, from 5 to 6 lemons
• ⅔ cup all-purpose flour, spooned into measuring cup and leveled-off

How to Make Lemon Bars

1. Gather all ingredients.
2. Position an oven rack in the center and preheat oven to 350°F (175°C).
3. Line a 9×13-inch metal baking pan with heavy-duty aluminum foil, press the foil into the corners, and spray the foil with nonstick cooking spray.

4. Zest the lemons before juicing, then juice them.

   

5. In a food processor, combine the all-purpose flour, cornstarch, salt, and confectioners’ sugar and pulse to mix.
6. Add cold unsalted butter pieces to the food processor and pulse until the mixture resembles a coarse meal with pea-sized butter pieces.
7. Evenly sprinkle the crust mixture into the prepared pan and press firmly with your fingers, forming a ¾-inch edge around the sides.

8. Chill the pressed crust in the refrigerator for 30 minutes or the freezer for 15 minutes.

   

9. Bake the crust 15 to 20 minutes, until lightly golden all over.
10. In a large bowl, whisk together the eggs, granulated sugar, lemon juice, lemon zest, and flour until smooth and lump-free.
11. Give the lemon filling a quick stir and pour it evenly over the hot baked crust immediately.

12. Return the pan to the oven and bake 30 to 35 minutes, until the topping is set and firm to the touch.

    

13. Cool the bars completely on a wire rack.
14. Lift the bars from the pan using the foil overhang and gently peel the foil away from the edges.
15. Cut the cooled bars into squares or triangles with a sharp knife, wiping or warming the blade between slices for clean edges.

16. Dust the cut bars with confectioners’ sugar before serving.

    

Pro Tips for Success

• Keep your butter nice and cold when cutting it into the flour or pulsing in the processor. This helps get that flaky shortbread texture we all love.
• Spoon your flour into the measuring cup and level it off for the best crust—not too dense or dry.
• Chill the pressed crust before baking (half an hour in the fridge or 15 minutes in the freezer) to help it hold together and keep the filling from leaking underneath. For a deeper dive into the science, see why chilling the crust matters.
• When mixing the filling, whisk thoroughly until it’s smooth and lump-free to get an even set.
• Don’t overbake the lemon topping. It should be firm but can have a gentle jiggle in the center—it finishes setting as it cools. For visual doneness cues, follow this step-by-step lemon bars recipe.
• Use a sharp knife for cutting, and let the bars fully cool or chill first. Cleaning your knife between slices or warming the blade with hot water can help slice perfect edges.
• Always zest your lemons before juicing. That way you won’t accidentally toss out the flavorful peel.
• Line your pan with heavy-duty foil or parchment paper to prevent sticking and make it easy to lift the bars out.

Flavor Twists and Add-Ins

• Meyer Lemon Bars: Swap regular lemons for Meyer lemons to get a sweeter, floral twist. You might need fewer lemons for the juice.
• Berry Topped: Scatter some fresh raspberries or blueberries over the crust before pouring the filling for a splash of fruity fun. For pairing inspiration, check out these raspberry lemon muffins. Gently press them so they don’t sink.
• Brown Butter Crust: Brown the butter first, chill it, then cut it into the dry ingredients for a nutty, caramel flavor in your crust.
• Poppy Seed or Coconut: Stir 1–2 tablespoons of poppy seeds into the filling or 1/3 cup shredded coconut into the crust for added flavor and texture (for the classic combo, see these lemon poppy seed muffins).
• Gluten-Free: Use a 1:1 gluten-free flour blend in both crust and filling. The texture will be a little different but still delicious.
• Less Sweet: If you prefer tangier bars, cut back the sugar in the filling by up to 1/2 cup, though this will change the flavor and firmness a bit.

Storing and Freezing Tips

Refrigerating: Keep your cooled lemon bars in a covered container in the fridge for up to 4 days. They taste great chilled—much like a no-bake lemon icebox cake—or brought to room temperature.

Freezing: Once completely cooled, wrap the entire batch (before slicing) tightly in foil or plastic wrap and freeze for up to 3 months. Thaw overnight in the fridge before cutting and dusting with powdered sugar.

Freezing individual pieces: For easy grab-and-go treats, freeze cut bars on a baking sheet until firm, then wrap each piece in plastic wrap and place in a freezer-safe container. This stops them from sticking and keeps each piece neat.

Troubleshooting and FAQs

Q: Why add cornstarch to the crust? A: Cornstarch softens and tenderizes the shortbread, creating a crisp yet delicate texture that won’t toughen after cooling.

Q: Can I use bottled lemon juice? A: You can, but fresh lemon juice and zest give a much brighter, fresher flavor. Bottled juice may taste flat in comparison.

Q: How do I know when the filling is done? A: It should be set and firm to the touch with maybe a tiny, very gentle jiggle in the center—it’ll finish firming up as it cools; you’ll find the same visual cues explained in our Creamy Lemon Pie.

Q: Can I make these bars ahead? A: Absolutely! Bake, cool, and then refrigerate up to 4 days or freeze for longer storage—both work great (see tips above).

Q: My bars cracked a bit while cooling—is that bad? A: Small cracks are totally normal and don’t affect the taste. To avoid, don’t overbake and try to keep temperature changes gradual.

Q: How can I get neat slices? A: Chill them completely first, use a sharp knife, wipe the blade between slices, or warm the knife slightly with hot water and dry it before cutting for clean edges.