These classic lemon bars are tart, sweet, and made with a thick lemon curd layer over a buttery shortbread crust. An easy dessert recipe finished with powdered sugar and perfect for any occasion.

Classic Lemon Bars (Easy Lemon Squares Recipe with Buttery Shortbread Crust)

I will be the first to admit that historically speaking, I am not a classic lemon bar kind of girl.

I am not a fan of lemon custard or lemon curd or any kind of flan or things of that nature so I naturally assumed that lemon bars aka lemon squares would not be my jam (pun intended!) at all.

Pfffffftttttt…..

This is one easy lemon dessert recipe that is wholeheartedly my jam, apparently, as I unapologetically inhaled multiple tangy, tart lemon bars at the speed of light with no regard for others.

.. munch .. munch .. munch …

Best lemon bars EVER!

By the way, if you love lemon flavor like me, don’t forget to check out my Lemon Donut Bundt Cake, Blueberry Lemon Bread and my Pink Lemonade Cake.

What Are Lemon Bars?

Lemon bars are super tender buttery shortbread crust topped off with a delicate tart and tangy lemon curd then sprinkled with way too much powdered sugar.

The lemon curd filling is thick and the buttery shortbread crust crumbly in the very best way.

They are packed with intense lemon flavor and there is just a slight snap as you bite into them before you lick the powdered sugar off your fingers. Heaven in a 3 x 3 square!

Why These Classic Lemon Bars Work

Flavor: Tart, tangy refreshing lemon bars are the perfect easy dessert to bring to every summer BBQ, pool party and get together.
Easy: These easy lemon squares are made with just a handful of ingredients you probably already have on hand.
Thick: This classic lemon bar recipe delivers a thick layer of lemon curd, not a thin layer as so many other recipes call for.
Potluck Approved: Need a quick lemon dessert recipe for every spring and summer potluck, barbeque and pool party? Here you go..

Ingredients for Lemon Bars

All purpose flour – Gives the perfect amount of structure to both the buttery shortbread crust and the lemon curd filling.
Sugar – Perfect sweetener to balance the tartness of the lemon filing.
Lemons – Fresh squeezed for optimum flavor.
Butter – no substitutions, please! Real butter is the base of this perfect shortbread crust.
Eggs – Stabilizes and gives structure to the lemon filling.
Baking Powder – helps to thicken the lemon curd.
Powdered Sugar – An extra layer of sweetness ton top!

How to Zest a Lemon (No Zester Needed)

Use a fine grater or box grater – The small holes work just like a microplane and give you fine zest without bitter pith.
Try a vegetable peeler + knife – Peel thin strips, then finely mince the peel for a quick DIY zest.
Only use the yellow part – The white pith underneath is bitter and will throw off your flavor.
Roll the lemon first – Press and roll it on the counter before cutting to release more oils and juice.

Tools That Make Zesting Easier

Microplane zester – The gold standard. Fast, fluffy zest with zero effort.
Box grater (fine side) – Budget-friendly and already in most kitchens.
Citrus peeler – Great for larger batches or garnish-style strips.

How to Make Lemon Bars (Step-by-Step)

To make these easy lemon squares, preheat your oven to 375 degrees and line a 9 x 13 pan with parchment paper and set aside.
Start with your shortbread crust. In a large mixing bowl, add flour, powdered sugar, salt, lemon zest and cold butter cut into little pieces.

Using your hands or an electric mixer, cut the butter into the dry ingredients until it all looks like crumbs.

Keep mixing your dough until it no longer looks like crumbs and it comes together to make a crust dough.
Take that dough and evenly press into the bottom of your baking pan. Bake your shortbread crust for 20 minutes.

How to Make the Perfect Lemon Curd Filling

While your crust is baking, add eggs, sugar, flour, baking powder, lemon juice and lemon zest to a large mixing bowl. Mix well until your lemon curd mixture is loose and a bit frothy.

Once your crust is done, remove from the oven and pour your lemon curd mix on top of the crust.
Reduce your oven temp to 350 degrees and bake your lemon bars for another 25 minutes.
Remove from the oven and move pan to a wire rack to cool.
Wait 30 minutes and then remove the lemon bars from the pan by picking up the edges of the parchment paper and carefully (they are super gentle at this point!) to baking sheet.

Move your baking sheet to the refrigerator to chill for 1 hour before dusting them with powdered sugar. These classic lemon bars can be stored in an airtight container in the refrigerator.

Tips for Clean Slices (No Crumbling Bars)
- Cool completely before cutting – Warm lemon bars are basically chaos in dessert form. Let them fully set so the filling firms up.
- Chill for the cleanest edges – Pop them in the fridge for at least 1–2 hours (or overnight if you’re planning ahead). Cold bars slice like a dream.
- Use a sharp knife, not a saw – Press straight down for each cut. No dragging, no “gentle sawing”—that’s how crusts crumble.
- Wipe the knife between cuts – Sticky lemon filling builds up fast. A quick wipe keeps every slice bakery-clean.
- Dust with powdered sugar after slicing – If you do it before, it melts and hides your clean edges. After = pretty + intentional.
- Lift with parchment for perfect squares – If your pan is lined, lift the whole slab out before cutting for more control and cleaner results.

Pro Tips for Classic Lemon Squares

This classic lemon bar recipe calls for a lot of lemon zest. You are going to need around 6 lemons but I promise it’s worth it!
If you find your shortbread is giving you trouble while you are trying to get it to it’s dough stage, set your mixer aside and get your hands in there! I found the easiest way to bring my dough together was to get my hands in the bowl and start crumbling the butter together with the dry ingredients and then mix with my electric mixer. I went back and forth doing this a few times and my crust came out perfect.
If you find that your lemon zest has stuck to your electric beaters, simply swish your beaters (in Off position) through your lemon curd mixture and use a soft spatula to release the remaining zest from your beater.
Use a small fine mesh strainer to dust your lemon bars with powdered sugar. It makes life so easy and I use that strainer on a daily basis for various reasons so if you don’t already own one, it’s an inexpensive investment that you won’t regret.

How to Store Lemon Bars

Refrigerate for best freshness – Store lemon bars in an airtight container in the fridge for up to 5–6 days. They actually taste better after a day as the flavors settle in.
Layer with parchment paper – If stacking, place parchment between layers so the powdered sugar and filling don’t stick together.
Keep them chilled for structure – Lemon bars hold their clean slices best when cold, so refrigeration isn’t just storage—it’s part of the strategy.
Freeze for longer storage – Wrap tightly and freeze for up to 2–3 months. Thaw in the fridge overnight before serving.
Add powdered sugar after thawing – If freezing, wait to dust with powdered sugar until just before serving for the best look and texture.

More Easy Lemon Recipes

Enjoy ♥ Heather