Classic Lemon Bars

Buttery shortbread crust topped with a bright, tangy lemon custard and a generous dusting of powdered sugar. These lemon bars are sunshine in every bite.

Desserts · Prep 15 min · Cook 40 min · Serves 16 · Medium · By Tina · Published

Classic Lemon Bars - desserts recipe

Ingredients

  • 1 cup all-purpose flour, for crust
  • 1/4 cup powdered sugar, for crust, plus more for dusting
  • 1/2 cup cold butter, cubed
  • 1/4 tsp salt
  • 3 large eggs
  • 1 cup granulated sugar
  • 3 tbsp all-purpose flour, for filling
  • 1/3 cup fresh lemon juice, about 3 lemons
  • 2 tsp lemon zest

Sunshine You Can Eat

I dare you to eat a lemon bar and not smile. It is physically impossible. These little squares of heaven have everything — a crumbly, buttery shortbread base topped with a silky, tangy lemon custard and a generous snowfall of powdered sugar. They are bright, refreshing, and just sweet enough without crossing into cloying territory. I make them for every spring gathering, every summer barbecue, and honestly any time I find good lemons at the store.

They look elegant enough for a dinner party but take less than an hour of actual effort. That is my favorite kind of recipe — the kind that seems way more impressive than the work you actually put in.

The Buttery Shortbread Foundation

Preheat your oven to 175°C/350°F and line a 20x20cm (8x8 inch) baking pan with parchment paper, leaving an overhang on two sides so you can lift the bars out later. Trust me, this makes cutting them a thousand times easier.

In a bowl, mix together one cup of all-purpose flour, a quarter cup of powdered sugar, and a quarter teaspoon of salt. Cut in half a cup of cold, cubed butter using a pastry cutter or your fingers until the mixture resembles coarse, damp sand. Press this firmly and evenly into the bottom of the prepared pan — really pack it in with the bottom of a measuring cup for a solid, uniform base.

Bake the crust for 18 to 20 minutes until the edges are just barely starting to turn golden. Pull it out of the oven but keep the oven running — you are going to pour the filling right onto the hot crust.

The Brightest Lemon Filling

While the crust bakes, whisk together three large eggs, one cup of granulated sugar, three tablespoons of all-purpose flour, one-third cup of fresh lemon juice (about three lemons worth), and two teaspoons of lemon zest. The filling should be smooth, bright yellow, and pourable. Pour it immediately over the hot crust — pouring onto a warm base helps the filling set properly and bond with the shortbread.

Slide it back into the oven and bake for another 20 to 22 minutes until the filling is set and no longer jiggly in the center. It will puff up slightly while baking and then settle back down as it cools — that is completely normal.

Cool, Slice, and Dust

Let the bars cool completely in the pan, then refrigerate for at least two hours until they are fully chilled and firm. Use the parchment overhang to lift them out in one piece, set them on a cutting board, and slice into squares. Dust generously with powdered sugar right before serving — this is the finishing touch that makes them look absolutely beautiful.

Tina's Tips

  • Fresh lemon juice only — bottled juice has a flat, cooked flavor that lacks the brightness and zing of freshly squeezed lemons
  • Zest your lemons before juicing them — it is so much easier to zest a whole lemon than one you have already cut in half and squeezed dry
  • Do not overbake the filling — pull them out when the center barely jiggles; it will continue to set as it cools and you want that silky, custardy texture
  • Dust with powdered sugar right before serving for the prettiest presentation; if you do it too early, the sugar absorbs into the filling and disappears
  • Add a tablespoon of limoncello to the filling for an adult version that is absolutely incredible at dinner parties

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