Equipment
* optional
Ingredients
Pate Sucree (Sweet Pastry)
- 250 g plain flour
- 100 g icing sugar
- 2 g salt
- 125 g unsalted butter, cold and cubed
- 1 egg, cold
Lemon Curd Filling
- 150 ml lemon juice, freshly squeezed
- 15 g lemon zest, finely grated
- 200 g granulated sugar
- 4 eggs
- 2 egg yolks
- 150 g unsalted butter, cubed, room temperature
Nutrition (per serving)
Nutrition is estimated per serving. Nutrients without complete source data are omitted.
Full nutrition
- Calories
- 569 kcal
- Protein
- 8 g
- Carbohydrates
- 63 g
- Fat
- 32 g
- Fiber
- 1 g
- Sugar
- 38 g
- Sodium
- 149 mg
- Saturated Fat
- 19 g
- Trans Fat
- 0 g
- Monounsaturated Fat
- 10 g
- Polyunsaturated Fat
- 2 g
- Cholesterol
- 237 mg
- Potassium
- 113 mg
- Calcium
- 40 mg
- Iron
- 1.1 mg
- Magnesium
- 13 mg
- Phosphorus
- 123 mg
- Zinc
- 0.8 mg
- Vitamin A
- 302 mcg
- Vitamin C
- 10 mg
- Vitamin D
- 0.9 mcg
- Vitamin E
- 1.3 mg
- Vitamin K
- 3 mcg
- Vitamin B6
- 0.1 mg
- Vitamin B12
- 0.4 mcg
- Thiamin
- 0.07 mg
- Riboflavin
- 0.20 mg
- Niacin
- 0.5 mg
- Folate
- 34 mcg
- Water
- 54 g
Sources: USDA FoodData Central
Method
Sift the plain flour, icing sugar, and salt into the bowl of a food processor.
Add the cold cubed butter and pulse the mixture until it resembles coarse breadcrumbs.
Add the whole egg and pulse briefly until the dough just begins to clump together into a ball.
Turn the dough out onto a work surface, shape it into a flat disc, and wrap it tightly in plastic wrap.
Chill the wrapped dough in the refrigerator for 1 hour to firm up the butter and relax the gluten.
Preheat the oven to 180°C (350°F).
Roll the chilled dough on a lightly floured surface to an even 3mm thickness, rotating a quarter turn after each roll to prevent sticking.
Carefully lift the dough into the tart tin, gently pressing it into the fluted edges without stretching. Trim any overhanging pastry, then thoroughly prick the base with a fork.
Chill the lined tart tin in the refrigerator for 30 minutes to minimize shrinkage during baking.
Line the chilled pastry case with parchment paper, ensuring it covers the edges, and fill completely to the brim with baking beans or pie weights.
Bake the tart shell at 180°C (350°F) for 15 minutes. Carefully remove the parchment and weights, then return to the oven for a further 10 to 12 minutes until the pastry is completely dry and deeply golden brown.
Transfer the baked tart shell to a wire rack and let it cool completely.
In a heatproof bowl, whisk together the fresh lemon juice, lemon zest, granulated sugar, whole eggs, and egg yolks until well combined.
Set the bowl over a saucepan of gently simmering water, ensuring the bottom of the bowl does not touch the water. Whisk constantly until the mixture thickens and registers 82°C (180°F) on an instant-read thermometer.
Immediately strain the thickened curd through a fine-mesh sieve into a clean bowl to remove the lemon zest and any small bits of cooked egg.
Allow the strained curd to cool slightly until it reaches 60°C (140°F).
Add the room-temperature butter cubes to the 60°C (140°F) curd. Using an immersion blender, blend the mixture for 2 to 3 minutes until an extremely smooth, glossy emulsion forms.
Pour the warm, emulsified lemon curd directly into the completely cooled tart shell. Gently tilt the tart to encourage the filling to settle into an even, flat layer.
Carefully transfer the filled tart to the refrigerator and chill for at least 2 hours, uncovered, until the curd is completely set.
Chef's Notes
- Temperature precision is the key to perfect curd. Emulsifying the butter at exactly 60C (140F) guarantees that the butter softens into the mixture without breaking, creating an incredibly silky texture.
- For the brightest, most intense lemon flavor, vigorously rub the lemon zest into the granulated sugar with your fingertips before adding the eggs. This abrasive action releases the essential citrus oils trapped in the zest directly into the sugar.
- Always use a non-reactive bowl (such as glass, ceramic, or stainless steel) when cooking lemon curd. Aluminum cookware reacts with the high acidity of the lemons, imparting a metallic taste and an unappetizing grayish-green tinge to the eggs.
- Blind baking the tart shell fully is absolutely crucial. Because the wet filling goes into the shell warm and sets in the fridge rather than baking in the oven, any underbaked pastry will immediately absorb moisture and become unpleasantly soggy.
Storage
Refrigerator: 3 days — Keep loosely covered. The pastry will gradually soften after the first day.
Troubleshooting
The lemon curd is runny and fails to set upon chilling.
Cause: The egg proteins were not heated sufficiently to coagulate.
Fix: Return the cooled curd to a double boiler and gently reheat while whisking until properly thickened. If already in the tart shell, it cannot be fixed.
Prevention: Ensure the curd is cooked slowly over the double boiler until it reaches exactly 82C (180F).
The curd split, becoming greasy or grainy when the butter was added.
Cause: The curd was too hot when the butter was introduced, causing the fat to melt rather than emulsify.
Fix: Add a teaspoon of very cold water and blend aggressively with the immersion blender to re-establish the emulsion.
Prevention: Wait until the strained curd drops to 60C (140F) before adding the butter.
The pastry shrank dramatically down the sides of the tin during baking.
Cause: The gluten in the flour was overworked during mixing, or the dough was not rested long enough.
Fix: Cannot be fixed once baked.
Prevention: Mix the dough only until it just comes together, and observe both resting periods (1 hour before rolling, 30 minutes after lining the tin).
The bottom crust of the tart is pale and soggy.
Cause: The blind baking phase was too short, leaving raw dough underneath.
Fix: Cannot be fixed once the filling is added.
Prevention: Bake the empty shell until it is deeply golden brown all over before adding any wet filling.
Cultural Context
The Tarte au Citron is a cornerstone of classic French patisserie, originating in the coastal regions of the Mediterranean where lemons grow abundantly in the warm, sunny climate. Historically favored by French royalty for its palate-cleansing properties, the dessert is beloved for its dramatic contrast between a buttery, crisp, cookie-like pate sucree and a sharply acidic, impossibly rich citrus filling.
