Lemon Curd Meringue Pie with a Crisp Crust

Lemon curd meringue pie pairs a crisp pastry shell with bright, tangy lemon filling and a cloud of toasted meringue. This version uses a cooked lemon curd thickened on the stove and a Swiss-style meringue, so the filling slices cleanly and the topping is gently warmed before browning.

Ingredients

1 unbaked 9-inch (23 cm) pie crust, homemade or store-bought, about 9 oz (255 g)
2 tbsp (16 g) cornstarch
1 cup (200 g) granulated sugar, divided
1 cup (240 ml) water
2 tsp (4 g) finely grated lemon zest, from about 2 lemons
½ cup (120 ml) fresh lemon juice, from about 3 lemons
4 large egg yolks, about 72 g, at room temperature
4 tbsp (56 g) unsalted butter, cut into pieces
4 large egg whites, about 120 g, at room temperature
¼ tsp (1 g) cream of tartar
⅛ tsp (0.75 g) fine salt
½ tsp (2.5 ml) vanilla extract

Instructions

Blind-bake the crust. Heat the oven to 375°F (190°C). Fit the crust into a 9-inch (23 cm) pie plate, crimp the edge, and prick the base lightly with a fork. Line with parchment and fill with pie weights or dry beans. Bake 15 minutes, remove the weights and parchment, then bake 8–10 minutes more, until the base looks dry and lightly golden. Set aside to cool slightly. Reduce the oven to 350°F (175°C).
Start the lemon filling. In a medium saucepan, whisk the cornstarch with about ¼ cup (50 g) of the sugar. Gradually whisk in the water until smooth, then stir in the lemon zest and juice. Cook over medium heat, whisking constantly, until the mixture thickens and bubbles, about 4–6 minutes. Let it bubble gently for 30 seconds while whisking; this cooks out the starchy taste.
Temper the yolks and finish the curd. In a bowl, whisk the egg yolks. Slowly whisk about ½ cup (120 ml) of the hot lemon mixture into the yolks, then pour the yolk mixture back into the saucepan in a thin stream, whisking constantly. Cook over low to medium-low heat for 2–3 minutes, stirring continuously, until thick and glossy. Do not let it boil. Remove from the heat and whisk in the butter until melted. Pour the hot filling into the crust and smooth the top.
Make the meringue. Put the egg whites, remaining ¾ cup (150 g) sugar, cream of tartar, and salt in a clean heatproof bowl. Set it over a saucepan of gently simmering water, making sure the bowl does not touch the water. Whisk constantly until the sugar dissolves and the mixture reaches 160°F (71°C), about 4–6 minutes; check with a food thermometer. This meets the USDA FSIS safe minimum temperature for egg dishes. Take the bowl off the heat and beat with an electric mixer on medium-high until glossy peaks form and the bowl feels barely warm, 5–7 minutes. Beat in the vanilla.
Top and bake. Spoon the meringue over the still-warm filling, spreading it all the way to the crust edge to seal it. Make soft peaks with the back of a spoon. Bake at 350°F (175°C) for 10–12 minutes, until the tips are lightly browned. The meringue is already cooked to a safe temperature in the bowl; the oven step colors it.
Cool and chill. Cool the pie on a rack for 1 hour, then refrigerate uncovered until set, at least 2 hours. Loosely cover once fully chilled and serve cold or cool. Use a clean, dry knife for neat slices.

Tips

Use fresh lemon juice for the clearest citrus flavor. Bottled juice can work in a pinch, but its flavor is less fresh; keep the zest if possible.
Whisk the yolks while adding hot filling, and keep stirring once they return to the pan. Adding hot liquid too quickly or leaving the curd unstirred can scramble the yolks.
Seal the meringue against the crust all around. If it only sits on the filling, it is more likely to shrink or pull away as it cools.
For a less sweet topping, do not reduce the sugar in the meringue substantially: sugar helps stabilize the egg whites. A handheld torch can brown the top instead of the final oven bake, but keep the flame moving.

Serving Suggestions

Serve chilled or cool, cut into eight wedges. The pie is rich and tart, so plain slices work well; add a few fresh berries or a small spoonful of unsweetened whipped cream if you like. For clean cuts, wipe the knife between slices and avoid pressing down on the meringue.

Variations

For a graham cracker crust, replace the pastry with 1½ cups (150 g) graham cracker crumbs mixed with 5 tbsp (70 g) melted butter and 2 tbsp (25 g) sugar. Press into the plate and bake at 350°F (175°C) for 8–10 minutes before filling. The result is sweeter and more crumbly than pastry.

For a sharper lemon flavor, add up to 1 tsp (2 g) extra zest, but keep the juice and cornstarch quantities unchanged so the filling sets. You can also use a prebaked shortcrust shell; follow its package or recipe instructions, since baking times vary. A Swiss meringue may be replaced with an Italian meringue, but that requires a separate hot-syrup method and careful handling; do not simply substitute uncooked whipped egg whites.

Storage and Reheating

Refrigerate the pie within 2 hours of baking, and keep it covered in the refrigerator for up to 2 days for best meringue texture. The pie can remain safe for 3–4 days when continuously refrigerated, but the meringue may weep and the crust soften. Do not leave it at room temperature for more than 2 hours, or more than 1 hour if the room is above 90°F (32°C). Freezing is not recommended because thawing can make the meringue watery and the filling grainy. Serve cold; reheating is unnecessary and can damage the topping.

Frequently Asked Questions

Why is my lemon filling runny?
It may not have cooked long enough to activate the cornstarch, or the pie may not have chilled long enough. Cook the starch mixture until it bubbles, then give the finished pie at least 2 hours in the refrigerator before slicing.

Why does meringue weep or bead?
Moisture can collect when meringue cools slowly, is undercooked, or sits for a long time. Dissolving the sugar fully, heating the whites to 160°F (71°C), spreading the meringue over warm filling, and sealing it to the crust all help reduce weeping.

Can I make the pie ahead?
Yes. Make it the day you plan to serve it, then chill it for at least 2 hours. The crust and lemon filling can be prepared a day ahead and refrigerated, but meringue is best made and baked on serving day for its lightest texture.

How do I know the meringue is ready?
The whites and sugar should reach 160°F (71°C) on a food thermometer, and the sugar should feel dissolved when a little mixture is rubbed between clean fingers. After beating, it should form glossy peaks that hold their shape.

Can I use bottled lemon juice?
Yes, use the same ½ cup (120 ml) quantity, but the flavor may be flatter or more acidic than fresh juice. Avoid sweetened lemon products, and use fresh zest for a brighter aroma.

Can I use a torch instead of baking the topping?
Yes. Once the pie is topped, brown the meringue with a kitchen torch, moving it continuously to avoid scorching. The egg whites must still be heated to 160°F (71°C) in the bowl; torching the surface alone does not reliably cook the meringue through.

More recipes to cook

Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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