Pin It These classic lemon bars combine a tender buttery shortbread base with a bright citrus filling made from fresh lemon juice and zest. The crust bakes until golden before being topped with the tangy egg-based mixture and returned to the oven until just set. After cooling completely, the bars are sliced and finished with a generous dusting of powdered sugar for an elegant presentation.
Last summer, my neighbor brought over a bag of lemons from her tree, more than anyone could reasonably use. I made three batches of these bars that week, leaving little stacks on doorsteps up and down the street.
My grandmother kept a glass jar of lemon bars on her counter, tucked under a cake dome. She swore they tasted better on the second day, after the flavors had time to really settle in and get acquainted.
Ingredients
- Unsalted butter: Room temperature butter creates the tenderest crumb, so take it out of the fridge at least an hour before baking
- Granulated sugar: Cream this thoroughly with the butter until it looks pale and fluffy, like tiny air pockets that make the crust melt in your mouth
- All purpose flour: Measure by spooning into your measuring cup and leveling off with a knife for accuracy
- Salt: Just enough to make the sweetness pop without tasting salty
- Lemon juice: Fresh squeezed is absolutely worth the effort, nothing else gives that bright punchy flavor
- Lemon zest: Grate this first before you juice the lemons, and really press the zest into the sugar to release those oils
- Eggs: Room temperature eggs incorporate more smoothly into the filling
- Powdered sugar: The finishing touch that makes these look like they came from a bakery
Instructions
- Prepare your kitchen:
- Preheat your oven to 350°F (175°C) and line a 9x13 inch baking pan with parchment paper, letting the edges hang over like little handles.
- Make the crust:
- Beat the softened butter and 1/2 cup sugar until fluffy and pale, then fold in the flour and salt just until the dough comes together.
- Bake the foundation:
- Press the dough into your pan in an even layer and bake for 18 to 20 minutes until the edges turn golden brown.
- Whisk the filling:
- While the crust bakes, stir together the sugar and flour, then add eggs, lemon juice, and zest until the mixture is smooth and bright yellow.
- Layer it on:
- Pour the lemon filling over the hot crust the moment it comes out of the oven, watching it spread across the surface.
- Set the bars:
- Return to the oven for another 18 to 20 minutes until the filling is set but still jiggles slightly in the center.
- Let them rest:
- Cool completely in the pan, then lift out by the parchment edges and slice into 16 neat squares.
- Add the dusting:
- Sift powdered sugar over the tops just before serving, like fresh snow on a bright yellow morning.
Pin It These became my go to contribution for summer potlucks after someone asked for the recipe on a napkin at a Fourth of July party. Now I keep a mental list of who deserves a special batch.
Making Them Your Own
Meyer lemons turn these into something entirely different, sweeter and more floral, worth seeking out at farmers markets in winter.
Getting The Perfect Cut
Run your knife under hot water and wipe it clean between slices for the cleanest edges that make people think you bought them.
Storage And Sharing
These keep remarkably well in the refrigerator, actually developing deeper flavor after a day or two. Layer them between parchment paper in an airtight container and they will last up to a week, though they have never lasted that long at my house.
- Freeze them undusted for up to three months
- Add powdered sugar after thawing
- Bring to room temperature before serving
Pin It There is something so satisfying about a dessert that balances sweet and tart so perfectly, like sunshine on a plate.
Recipe Questions
- → How long should lemon bars cool before cutting?
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Allow the bars to cool completely in the pan, approximately 1-2 hours. For clean slices, refrigerate for 1-2 hours before cutting. The filling needs this time to fully set.
- → Can I use bottled lemon juice instead of fresh?
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Fresh lemon juice provides the best flavor and natural acidity. Bottled juice can work in a pinch but may result in a less vibrant taste. Meyer lemons offer a sweeter, less acidic alternative.
- → Why is my lemon filling runny?
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Runny filling typically indicates underbaking. The center should be just set with a slight jiggle, similar to cheesecake. If unsure, bake an additional 2-3 minutes and remember that continued cooling helps the filling firm.
- → How should I store lemon bars?
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Store in an airtight container in the refrigerator for up to 5 days. The bars actually develop deeper flavor after a day. Separate layers with parchment paper to prevent sticking. Bring to room temperature before serving.
- → Can I freeze lemon bars?
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Yes, freeze individual bars wrapped in plastic and placed in a freezer bag for up to 3 months. Thaw overnight in the refrigerator. Dust with powdered sugar after thawing for best appearance.
- → What's the secret to a tender shortbread crust?
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Mix the dough just until it comes together—overworking develops gluten and creates toughness. Using room temperature butter ensures proper creaming with sugar for a light, tender texture.
