Lemon Meringue Pie Recipe – How to Make Perfect Meringue

There’s a reason lemon meringue pie has a reputation as the trickiest dessert in the American baking canon — one wrong move and the whole show collapses. This guide walks through the most common pitfalls using techniques from three trusted sources: Mary Berry (BBC Food), Sally’s Baking Addiction, and Once Upon a Chef.

Egg yolks in filling: 6 (from Mary Berry’s recipe) ·
Egg whites in meringue: 6 (from Mary Berry’s recipe) ·
Cream of tartar: 1/4 tsp per egg white (standard recommendation) ·
Bake temperature: 350°F (175°C) for meringue topping

Six key facts that anchor every decision in this recipe — from egg count to oven temperature.

How many eggs do you need for lemon meringue?

The short answer: six large eggs, divided — yolks into the filling, whites into the meringue. Mary Berry’s classic lemon meringue pie (BBC Food) uses exactly this ratio, and it’s the standard across virtually every published recipe from Sally’s Baking Addiction to Once Upon a Chef. But the number matters less than the temperature.

Is it better to make meringue with cold or room temperature eggs?

Room temperature egg whites consistently produce greater volume and a more stable foam. Sally’s Baking Addiction emphasizes this point because cold egg whites have tighter protein structure — they take longer to whip and the resulting foam is less aerated. If you’re pressed for time, place whole eggs in a bowl of warm water for 5 minutes before separating; the whites will warm up without cooking.

The implication: temperature control is the cheapest insurance you’ll buy all day. Cold eggs work, but they require more whipping time and produce a less stable foam — exactly the wrong characteristic for a pie that sits overnight.

What is the perfect meringue secret?

There is no single secret, but three non-negotiable principles: add an acid for stabilization, add sugar slowly, and watch the weather.

What is the trick to making good meringue?

Start with a scrupulously clean bowl — any trace of fat (including yolk) will sabotage the foam. Whip the whites with cream of tartar — Once Upon a Chef uses 1/4 teaspoon per egg white — until soft peaks form. Then begin adding sugar one tablespoon at a time, beating continuously. Sally’s Baking Addiction warns that dumping all the sugar at once deflates the whites and produces a grainy meringue.

What must be avoided when making meringue?

• Humidity. Sugar is hygroscopic — it absorbs moisture from the air, which can cause weeping. Domino Sugar’s baking guide suggests avoiding meringue on rainy days.
• Overwhipping. Once stiff peaks form, stop. Overwhipped meringue looks dry and curdled; it won’t spread smoothly and may break down during baking.
• Underbaking. Bake at 350°F until the peaks are lightly golden — about 20 minutes. An underbaked meringue weeps because the interior hasn’t stabilised.

The takeaway: treat meringue as a day-of-only component. It’s less a topper than a structural decision — and structural decisions don’t hold up to a night in the fridge.

Is cream of tartar or cornstarch better for meringue?

Cream of tartar is the preferred stabilizer for French meringue. It’s an acid that lowers the pH of the egg whites, which helps the protein network coagulate more evenly. Sugar Spun Run uses it in their recipe, as does virtually every authoritative source.

Two stabilizers, one clear champion — but cornstarch can step in when you’re out of cream of tartar.

What happens if I don’t have cream of tartar for meringue?

You have three options: cornstarch (1 teaspoon per 2 egg whites, whisked into the sugar before beating), lemon juice (1/2 teaspoon per egg white, added at the start), or white vinegar (same ratio as lemon juice). Each provides the acid that cream of tartar offers, though the flavor impact is minimal if you’re using lemon juice in a lemon pie anyway. Food Network’s substitution guide confirms these ratios.

The catch: cornstarch absorbs moisture instead of acidifying. It works but produces a less structured meringue. If you have only cornstarch, plan to serve the pie the same day.

How to make lemon meringue filling?

The lemon filling is a curd thickened with cornstarch (or a cornstarch-flour blend). The technique matters more than the ingredient list.

Completely Delicious cooks sugar, cornstarch, and water until thick — about 6 minutes per Sally’s Baking Addiction — then tempers the egg yolks by whisking a spoonful of the hot mixture into them before returning everything to the pan. Tastes Better From Scratch adds flour to the starch mix for extra body. Finally, butter and lemon juice go in off the heat.

• Key timing: Add lemon juice after the starch mixture thickens. Acid inhibits cornstarch’s thickening power — Completely Delicious flags this explicitly.
• Temperature check: If the filling is too hot when you spread the meringue on top, steam can leak through and cause weeping. Let it cool for 5 minutes.
• Butter finish: A tablespoon of butter stirred in at the end adds shine and rounds the acidity.

1. Blind bake the pie crust at 375°F, then reduce to 350°F until golden.
2. In a saucepan, whisk sugar, cornstarch, and water. Cook over medium heat until thick and bubbling (about 6 minutes).
3. Temper the egg yolks: whisk a spoonful of the hot mixture into the yolks, then return to the pan. Cook 1 minute more.
4. Remove from heat; stir in butter and lemon juice. Let cool for 5 minutes.
5. In a clean bowl, whip egg whites and cream of tartar to soft peaks. Gradually add sugar, beating to stiff peaks.
6. Spread filling into the baked crust. Top with meringue, sealing to the crust edge.
7. Bake at 350°F for 20 minutes until meringue is lightly golden. Cool before serving.

The editorial read: the filling is the unsung pressure point. Most home bakers obsess over meringue, but a weeping pie often starts with a filling that wasn’t thick enough or was too hot when sealed.

Is it okay to make a lemon meringue pie the day before?

Technically yes. Practically, you’ll trade convenience for meringue quality. Completely Delicious notes that many recipes chill the filled pie for hours before serving to firm up for cleaner slicing. But the meringue — especially a French meringue — will weep overnight. Once Upon a Chef anchors the meringue all the way to the crust edge to reduce shrinkage.

The smarter play: blind bake the crust and prepare the filling a day ahead, store separately, then assemble and bake the meringue on serving day. Sugar Spun Run advises chilling pie dough before blind baking and using pie weights to prevent shrinking — that prep can happen days in advance.

The pattern: lemon meringue pie is best consumed within 24 hours of assembly. For a dinner party, do the crust and filling the day before, then add meringue and bake 30 minutes before guests arrive.

“Heating egg whites and sugar before beating them helps stabilize the meringue so it does not weep.”

Once Upon a Chef

“Sally’s Baking Addiction instructs cooks to partially blind bake the crust in a 9-inch pie dish before making the filling.”

Sally’s Baking Addiction

“A common meringue technique is to add sugar gradually while beating egg whites to soft or stiff peaks rather than dumping all sugar in at once.”

Sally’s Baking Addiction

One final note on storage: USDA Food Safety guidelines recommend refrigerating egg-based pies and consuming within 3 to 4 days. For lemon meringue pie specifically, the meringue will begin to break down after 24 hours, so day-of serving is ideal.

Related reading: Easy Lemon Meringue Pie · Lemon Meringue Pie

Frequently asked questions

For the home baker in New York or Des Moines who’s been burned by a weeping meringue, the choice is clear: invest 20 extra minutes in Swiss meringue technique and serve the pie the same day, or accept the trade-off between convenience and that perfect cloud-like top.