The Pan That Earned a Blue Ribbon

Years ago I brought a pan of these to our town bake-off, and a judge went back for a second square before she even picked up her scorecard.

That tiny moment is part of why I started sharing recipes, and you can learn more about DanyRecipes if you’d like the whole story. This lemon bars recipe layers a buttery, cornstarch-tender crust under a glossy filling that tastes like sunshine with a little sugar on top.

What Makes These Bars a Winner

The secret is balance. Rubbing the zest into the sugar releases the lemon oils, so every bite tastes bright and full instead of just sour.

This is a true lemon bars from scratch method with a sturdy 9×13 pan, so you get tall, even squares that slice cleanly for crowds. If you collect lemon desserts, these pair beautifully with my chewy thumbprint lemon curd cookies on a dessert table.

Gather Your Citrus and Pantry Staples

For the crust:

2 1/4 cups all purpose flour
1/2 cup powdered sugar, plus more for dusting
2 tablespoons cornstarch, for a softer, more tender bite
1/2 teaspoon fine salt
1 cup (2 sticks) cold unsalted butter, cut into small cubes
1 teaspoon vanilla extract

For the lemon filling:

2 cups granulated sugar
2 tablespoons lemon zest, from about 3 lemons
5 large eggs, at room temperature
3/4 cup fresh lemon juice, strained
1/3 cup all purpose flour, sifted
1/4 teaspoon fine salt

From Mixing Bowl to Golden Pan

STEP 1

Heat the oven to 350°F and line a 9×13 pan with parchment, leaving a generous overhang on the long sides for easy lifting.

STEP 2

Whisk the flour, powdered sugar, cornstarch, and salt, then work in the cold butter and vanilla until soft, sandy crumbs form.

STEP 3

Press the dough into the pan in an even layer, prick it all over with a fork, and bake for 20 minutes until pale golden at the edges.

STEP 4

Rub the zest into the granulated sugar with your fingertips until it smells fragrant and looks like damp sand.

STEP 5

Whisk in the eggs, lemon juice, flour, and salt until the mixture is smooth, then pour it over the warm crust.

STEP 6

Bake for 22 to 26 minutes until the edges are set and the center has just a slight wobble, then cool on a rack and chill for 2 hours.

STEP 7

Lift the slab out by the parchment, dust with powdered sugar, and slice into squares with a clean, sharp knife.

Serving Ideas and Easy Twists

Fold a tablespoon of finely chopped fresh thyme into the crust for an herby surprise.
Top each square with a thin slice of candied lemon for a bakery counter look.
Serve with strong black tea or a scoop of vanilla ice cream.
Add a plate of my crispy shortbread lemon curd cookies beside the bars for a buttery crunch contrast.
Swap in blood orange juice for half the lemon juice during winter citrus season.

Award-Winning Sweet Lemon Bars

These award-winning sweet lemon bars feature a buttery, tender shortbread crust and a glossy, bright lemon filling. Rubbing fresh lemon zest into the sugar releases its fragrant oils, creating a perfectly balanced citrus flavor. Finished with powdered sugar, these bakery-style bars are ideal for bake-offs, parties, and dessert trays.

Print Recipe Pin Recipe

Prep Time 25

Cook Time 46

Cooling and Chilling Time 2

Total Time 3 11

Servings: 24 bars

Course: Dessert

Cuisine: American

Calories: 245

Ingredients Equipment Method Notes

Ingredients

Shortbread Crust

2 1/4 cups all-purpose flour
1/2 cup powdered sugar plus more for dusting
2 tbsp cornstarch
1/2 tsp fine salt
1 cup unsalted butter 2 sticks, cold and cut into small cubes
1 tsp vanilla extract

Lemon Filling

2 cups granulated sugar
2 tbsp lemon zest from about 3 lemons
5 large eggs at room temperature
3/4 cup fresh lemon juice strained
1/3 cup all-purpose flour sifted
1/4 tsp fine salt

Equipment

9×13-inch Baking Pan
Parchment paper
Mixing bowls
Whisk
Fork
Wire Cooling Rack
Fine Grater or Zester

Method

Preheat the oven to 350°F (175°C). Line a 9×13-inch baking pan with parchment paper, leaving a generous overhang on the long sides to make lifting the bars easier.
Whisk together the flour, powdered sugar, cornstarch, and salt. Work in the cold cubed butter and vanilla extract until soft, sandy crumbs form.
Press the dough evenly into the prepared pan. Prick the surface all over with a fork, then bake for 20 minutes, until the edges are pale golden.
Place the granulated sugar and lemon zest in a bowl. Rub them together with your fingertips until fragrant and the sugar resembles damp sand.
Gently whisk the eggs into the lemon sugar. Add the strained lemon juice, sifted flour, and salt, mixing until smooth. Avoid over-whisking to prevent a foamy filling.
Pour the filling over the warm crust. Bake for 22 to 26 minutes, until the edges are set and the center has just a slight wobble.
Cool the pan on a wire rack, then chill for at least 2 hours. Lift the slab out using the parchment overhang, dust with powdered sugar, and slice into squares with a clean, sharp knife.

Notes

Store the lemon bars covered in the refrigerator for up to 5 days. Their flavor may deepen after the first night. For the smoothest filling, strain the lemon juice and whisk gently to avoid creating excess foam. If the top begins browning too quickly, move the pan to the center rack and loosely cover it with foil. Bake a day ahead if desired, but wait to dust with powdered sugar until just before serving. Optional variations include adding 1 tablespoon finely chopped fresh thyme to the crust, topping with candied lemon slices, or replacing half the lemon juice with blood orange juice.

Pro Tips

Strain the lemon juice so no seeds or pulp cloud the smooth filling.
Prick the crust before baking to keep it flat and prevent puffing.
Whisk the filling gently to avoid a foamy top that bakes up uneven.
Pull the pan from the oven when the center still wobbles slightly, since carryover heat finishes the set.
Chill thoroughly before cutting for crisp, bakery style edges.
Dust with powdered sugar only right before serving so it stays snowy white.

FAQs

How long do these lemon bars keep?
Store them covered in the refrigerator for up to 5 days. The flavor actually deepens after the first night.

Can I use bottled lemon juice?
Fresh juice gives a far brighter taste, so I strongly recommend it. If you must use bottled, choose a pure, not from concentrate variety and expect a milder flavor.

Why did my filling turn brown on top?
The oven was likely running hot or the pan sat too close to the top element. Move the rack to the center and tent the pan loosely with foil if the surface darkens early.

Can I make them ahead for a party?
Yes, bake them a full day ahead and keep them chilled. Dust with powdered sugar and slice just before guests arrive.

What if my crust sticks to the pan?
The parchment overhang solves this every time. Chill the finished bars for a few minutes before lifting if the edges cling.

A Blue Ribbon Kind of Goodbye

Few things make me happier than a pan of lemon bars cooling on the counter while the kitchen smells like a citrus grove. I hope these earn a permanent spot in your recipe box and a few compliments at your table. If you’re still craving more zest, try my melt in your mouth lemon curd cookies, the 5 ingredient glazed lemon curd cookies, or the zesty drop lemon curd cookies next.

Award-Winning Sweet Lemon Bars Recipe