Homemade Lemon Meringue Pie is all about the contrast between a sharp lemon filling and a light, sweet meringue. The filling is cooked on the stovetop until thick, poured into a baked crust while hot, then topped right away with meringue so the two layers meet cleanly.
I find the recipe much easier when I have the baked crust ready before I start the filling. Once the lemon mixture thickens, things move fairly quickly, and the meringue should go over the filling while it is still hot.
The other detail that matters is sealing the meringue all the way to the crust. That helps reduce shrinking around the edges as the pie cools.
If you love lemon desserts, try our Creamy Lemon Squares or Easy 7-Up Cake.
A Few Ingredients That Matter Most
Fresh lemons: Zest them before squeezing the juice. I avoid the white pith because it can taste bitter.
Flour and cornstarch: Using both gives the lemon filling enough body to slice once chilled without making it feel pasty.
Egg yolks: These need to be tempered gradually with hot filling before they go back into the saucepan. That keeps the custard smooth instead of scrambling the eggs.
Egg whites: Use a very clean, grease-free bowl. Even a little fat can make meringue harder to whip properly.
Ingredients
For the Lemon Filling
- 1 cup granulated sugar
- 2 tablespoons all-purpose flour
- 3 tablespoons cornstarch
- 1/4 teaspoon salt
- 1 1/2 cups water
- 2 lemons, zested and juiced
- 2 tablespoons butter
- 4 egg yolks, beaten
- 1 baked 9-inch pie crust
For the Meringue
- 4 egg whites
- 6 tablespoons granulated sugar
How to Make Lemon Meringue Pie
- Preheat the oven to 350°F and have the baked pie crust ready.
- Whisk the sugar, flour, cornstarch, and salt together in a medium saucepan.
- Gradually stir in the water, lemon juice, and zest until smooth.
- Cook over medium heat, stirring frequently, until the mixture boils and thickens.
- Stir in the butter.
- Place the beaten yolks in a small bowl. Slowly whisk about 1/2 cup of the hot lemon mixture into them.
- Whisk the warmed yolks back into the saucepan.
- Return the filling to a gentle boil and cook, stirring constantly, until thick and smooth.
- Immediately pour the hot filling into the baked crust.
- In a clean glass or metal bowl, beat the egg whites until foamy.
- Add the 6 tablespoons sugar gradually while beating until the meringue forms stiff, glossy peaks.
- Spread the meringue over the hot filling, making sure it touches the crust around the entire edge.
- Bake for about 10 minutes, or until the meringue is evenly golden.
- Cool the pie, then refrigerate before slicing and storing.
How I Avoid Runny Filling
The starch mixture needs to reach a real boil before the yolks are added. If the filling only gets warm but never thickens visibly, the final pie can stay too loose.
After the tempered yolks go back into the pan, keep stirring. The filling should look smooth and thick enough to leave a clear trail behind the spoon.
Tips for Better Meringue
Add the sugar gradually rather than dumping it in at once. I also spread the meringue over hot filling and push it right to the crust before shaping the top.
Do not overbake the topping trying to make every peak dark brown. A lightly golden surface is enough.
Storage
Once cooled, keep lemon meringue pie refrigerated. It is best within the first couple of days because the meringue can begin releasing moisture as it sits.
Frequently Asked Questions
Why is my lemon filling runny?
The starch mixture may not have cooked long enough to thicken. Bring it to a boil while stirring and keep cooking until the filling visibly changes texture.
Why is my meringue watery?
Humidity, under-whipping, or long refrigerator storage can all encourage moisture to form. Whip to stiff peaks, seal the meringue to the crust, and serve the pie relatively soon after chilling.
