What Makes a French Lemon Tart Different?

A well-made tarte au citron is not a lemon meringue pie in disguise. The French version prioritises the lemon curd itself — it should be intensely citrusy, smooth as silk, and set just enough to slice cleanly without wobbling excessively. The shell is thin, crisp, and slightly sweet. There is nowhere to hide in this recipe: the quality of your lemons, butter, and eggs will define the result.

Ingredients

Pâte Sucrée (Sweet Pastry Shell)

  • 200g plain flour
  • 100g unsalted butter, cold and cubed
  • 80g icing sugar, sifted
  • 1 egg yolk
  • 2–3 tbsp cold water
  • Pinch of fine salt

Lemon Curd Filling

  • Zest and juice of 4 unwaxed lemons (approx. 160ml juice)
  • 4 whole eggs + 2 extra yolks
  • 160g caster sugar
  • 180g unsalted butter, cubed

Method

Making the Pâte Sucrée

In a large bowl (or food processor), rub the cold butter into the flour until the mixture resembles coarse breadcrumbs. Add the icing sugar and salt, then the egg yolk and just enough cold water to bring the dough together — it should be firm, not sticky. Flatten into a disc, wrap, and refrigerate for at least one hour.

Roll the chilled pastry on a lightly floured surface to 3mm thickness. Line a 23cm loose-bottomed tart ring, pressing gently into the edges without stretching. Trim any overhang, then freeze for 20 minutes.

Blind bake at 180°C for 15 minutes with weights, then remove weights and bake a further 8–10 minutes until the base is a pale gold. Brush immediately with a thin wash of egg white and return to the oven for 2 minutes to seal. Cool completely.

Making the Lemon Filling

Combine the lemon zest, lemon juice, eggs, egg yolks, and sugar in a heavy-bottomed saucepan. Place over a low-medium heat and whisk constantly. As the mixture warms, it will thicken — this usually takes 8–12 minutes. Do not let it boil or the eggs will scramble.

Once the curd coats the back of a spoon thickly, remove from heat. Pass through a fine-mesh sieve into a jug to remove the zest and any cooked egg bits. Allow to cool to around 50°C, then add the cold butter cubes a few at a time, blending with an immersion blender or whisking vigorously until completely emulsified and glossy.

Filling and Setting the Tart

Pour the warm lemon curd into the cooled pastry shell, filling it to just below the rim. Bake at 130°C for 25–30 minutes, or until the filling is set at the edges but still has a slight jelly-like wobble at the centre when you gently shake the tray. It will firm further as it cools. Refrigerate for at least 2 hours before serving.

Serving Suggestions

  • Classic finish: Dust lightly with icing sugar before serving. Simple and elegant.
  • With Italian meringue: Pipe or spread meringue over the set tart and torch lightly for a more elaborate presentation.
  • With crème fraîche: A small spoonful of lightly whipped crème fraîche alongside cuts through the richness beautifully.

Key Tips

  • Use unwaxed lemons — waxed lemons have a coating that can give the zest a bitter, chemical note.
  • Don't rush the curd: Low heat and constant stirring prevent scrambling and produce a smoother result.
  • The butter emulsion matters: Adding butter off the heat and blending it in creates a curd that is glossy and voluptuous rather than grainy or greasy.