Name: Lemon Bars Recipe
Prep time: 30 min
Cook time: 55 min
Total time: 85 min
Ingredients: 1/2 lbunsalted butter ((16 Tbsp) room temperature); 1/2 cupgranulated sugar; 1 1/2 tspvanilla extract; 2 cupsall-purpose flour; 1/4 tspsalt; 7 large eggs (room temperature); 3 cupsgranulated sugar (*); 2 Tbsplemon zest (from 4 to 5 lemons); 1 cuplemon juice (freshly squeezed (from 5 large or 8 medium lemons)**); 1 cupall-purpose flour; Confectioners sugar (to dust)

Jump to Recipe Save it for Later

Bright, tangy lemon bars with a buttery shortbread base are one of my favorite simple desserts. They feel special but don’t demand complicated technique. You can make the crust in minutes, whisk a few ingredients for the filling, and still end up with something show-stopping.

I keep this recipe in heavy rotation because it reliably produces clean, bright flavor and those satisfying edges you want in a lemon bar. The steps are straightforward, and a little attention to temperature and timing makes a big difference.

Below you’ll find the exact ingredient list and step-by-step method I use every time. I also include practical notes on swaps, tools, and common mistakes so you finish with glossy, set lemon bars that slice well.

Ingredient Notes

Ingredients

1/2 lb unsalted butter (16 Tbsp), room temperature — gives a tender, flaky shortbread crust; room temperature butter creams and binds the dough best.
1/2 cup granulated sugar — sweetens and slightly tenderizes the crust.
1 1/2 tsp vanilla extract — rounds the flavor in the crust; don’t skip it.
2 cups all-purpose flour — structure for the crust; measure by spooning into the cup and leveling for accuracy.
1/4 tsp salt — balances sweetness and enhances the butter flavor in the crust.
7 large eggs, room temperature — create the custardy, set filling; room temperature eggs incorporate more evenly.
3 cups granulated sugar — primary sweetener for the lemon filling.
2 Tbsp lemon zest, from 4 to 5 lemons — concentrated lemon oils; zest before juicing to avoid bitterness.
1 cup lemon juice, freshly squeezed (from 5 large or 8 medium lemons) — fresh juice is essential for bright, clean flavor.
1 cup all-purpose flour — thickens the filling and helps it set into a sliceable bar.
Confectioners sugar, to dust — optional finish for a pretty presentation and a touch of sweetness on top.

Lemon Bars Cooking Guide

Preheat the oven to 350°F. Line a 13x9x2″ baking pan with parchment paper so the paper comes most of the way up the sides (leave an overhang on two opposite sides to lift the bars out later). Set a wire rack nearby.
Make the crust: in the bowl of a stand mixer fitted with the paddle attachment (or using a hand mixer), beat 1/2 lb (16 Tbsp) room-temperature unsalted butter and 1/2 cup granulated sugar until light and combined. Add 1 1/2 tsp vanilla extract, then add 2 cups all-purpose flour and 1/4 tsp salt. Mix on low-medium speed until the mixture is crumbly and no dry flour remains.
Press the crust mixture evenly into the bottom of the prepared pan using your fingertips or the bottom of a flat measuring cup to create a uniform layer. Bake the crust in the preheated 350°F oven for 18–20 minutes, or until the edges are lightly golden. Remove the pan to the wire rack and let the crust cool slightly while you make the filling. Keep the oven on.
Prepare lemons: zest lemons first to measure 2 Tbsp lemon zest, then squeeze fresh lemons to measure 1 cup lemon juice (recipe note: this will be about 5 large or 8 medium lemons). Set zest and juice aside.
Make the filling: in a large mixing bowl, whisk together 7 large room-temperature eggs and 3 cups granulated sugar until the mixture is blended and slightly smooth. Whisk in the 1 cup fresh lemon juice and the 2 Tbsp lemon zest until combined. Add 1 cup all-purpose flour and whisk until the filling is smooth and no visible traces of flour remain.
Pour the filling over the warm crust, spreading gently if needed to an even layer. Return the pan to the center of the preheated 350°F oven and bake for 30–35 minutes, or until the filling is set — the center should no longer be wobbly (a slight, very gentle jiggle is fine, but it should not look liquid).
Remove the pan from the oven and cool on the wire rack at room temperature for at least 1 hour. After the initial cooling, refrigerate the pan for at least 2 hours to fully set the filling.
To serve: use the parchment overhang to lift the chilled lemon bars from the pan and transfer them to a cutting board. Cut into 18–20 squares (wipe the knife between cuts for cleaner edges if desired). Dust the tops with confectioners sugar before serving.

Why This Recipe is a Keeper

This version hits three things I always chase in lemon bars: a tender, buttery crust; a bright, lemon-forward filling; and clean slices that hold together. The shortbread-style crust bakes into a sturdy base that resists sogginess. The high ratio of lemon juice and zest delivers genuine citrus flavor without being overly tart.

The method is forgiving. You don’t need a food processor for the crust, and the filling is simply whisked. Still, small details — like room-temperature eggs and fully chilling before cutting — make an outsized difference in the final texture and appearance.

Vegan & Vegetarian Swaps

These lemon bars as written use butter and eggs, so they’re not vegan. For vegetarian diets, the recipe is already suitable. If you want a vegan adaptation, expect texture changes; I’ll note practical ideas so you get reasonable results without inventing specific quantities here.

Butter substitute: Use a vegan stick butter in a 1:1 swap for the crust; chill slightly if too soft before pressing.
Egg replacement for filling: Common vegan thickeners include silken tofu blended with lemon and sugar, or a cornstarch-based custard using non-dairy milk. These will alter the flavor and texture and require testing to match the set and firmness of the original.
Fresh lemon juice and zest remain essential for flavor in any swap.

Hardware & Gadgets

Simple tools do the job. You don’t need specialized equipment to succeed.

Stand mixer with a paddle attachment or a reliable hand mixer — for creaming the crust ingredients smoothly.
13x9x2″ baking pan and parchment paper — the pan size is important for thickness and baking time; parchment overhang makes lifting the bars painless.
Microplane — for fine lemon zest without the bitter pith.
Citrus juicer or reamer — speeds juicing and reduces hand fatigue when you need 1 cup of juice.
Wire rack — important for even cooling before refrigeration.
Sharp chef’s knife and a towel or warm water for wiping between cuts — a clean knife gives tidy squares.

Errors to Dodge

Small missteps can undermine an otherwise simple recipe. Watch for these.

Overbaking the filling — the center should not look liquid. Remove when it’s set with just a tiny jiggle. Overbake and the filling becomes dry or rubbery.
Underbaking the crust — if the crust isn’t lightly golden before adding the filling, it can be doughy. Follow the 18–20 minute guideline and look for lightly golden edges.
Using bottled lemon juice — it lacks the brightness of fresh juice. Fresh is a must here.
Skipping refrigeration — cutting too soon will give messy, under-set bars. Chill for at least 2 hours after the initial cool down.
Measuring flour by packing the cup — spoon the flour into the cup and level off to avoid dense crust or an overly thick filling.

Make It Year-Round

Lemon bars feel seasonal, but they translate well to any time of year. In winter, reach for large California lemons or Meyer lemons if available; Meyer lemons are sweeter and give a softer flavor. In summer, the acidity is lively and perfect for warm-weather gatherings.

For a holiday twist, add a tiny sprinkle of finely chopped fresh herbs like thyme to the crust (optional) or top finished bars with a small dollop of whipped cream and a thin lemon slice when serving to make them feel festive.

Little Things that Matter

Pay attention to these details and you’ll notice a big difference.

Zest before juicing — zesting first ensures you don’t lose the aromatic oils trapped in the peel.
Room-temperature eggs — they incorporate more smoothly and help the filling set evenly.
Wipe your knife after each cut — produces those neat, bakery-style squares.
Let the crust cool slightly before pouring the filling — a very hot crust can cause the filling to bake unevenly.

Storage & Reheat Guide

Store lemon bars covered and refrigerated. They keep well for up to 5 days in the fridge. Use an airtight container or wrap the tray tightly with plastic wrap to prevent any odors from being absorbed.

To freeze, cut the bars into squares and place them in a single layer on a baking sheet to flash-freeze for an hour, then transfer to a freezer-safe container between layers of parchment. They can be frozen for up to 2 months. Thaw in the refrigerator overnight before serving. Dust with confectioners sugar after thawing; powdered sugar can get wet and clump if applied prior to freezing.

These bars are best served cold or at cool room temperature. Reheating is not recommended since the filling can become runny; simply let frozen or chilled bars sit at room temperature for 20–30 minutes before serving if you prefer them less cold.

Ask & Learn

If a batch doesn’t set properly, check whether the filling reached adequate temperature and if it was fully chilled before cutting. A slightly underbaked center often results from taking the pan out too early. Also double-check flour measurements — too much or too little will alter the set and texture.

Questions I often get: “Can I halve this?” Yes, you can scale quantities and use a smaller pan, but baking times will change. “Can I use a metal pan vs. glass?” Yes. Metal pans tend to brown crusts faster; adjust timing slightly and watch for color on the edges.

The Takeaway

These Lemon Bars combine a buttery shortbread base with a vibrant lemon custard for a reliable, satisfying treat. The recipe is straightforward and forgiving if you mind the small details: fresh juice, proper measuring, and patient cooling. With minimal equipment and simple ingredients, you can produce bakery-worthy bars that store well and travel nicely.

Follow the exact method above for consistent results. Once you’ve made them a couple of times, you’ll find timing and technique that fit your oven and preferences — and you’ll always have a crowd-pleasing dessert on hand.