Ingredients
Equipment
Method
- STEP 1: Prep the Crust Make sure your pie crust is fully baked and completely cool. If the crust is warm, the filling will not set properly.

- STEP 2: Make the Lemon Filling In a medium bowl, pour both cans of condensed milk. Zest all the lemons directly into the milk. Juice the lemons (about 3/4 cup) and slowly pour the juice in while stirring. The mixture will thicken immediately. Whisk in the 4 egg yolks until smooth.

- STEP 3: Cook the Filling Pour the mixture into a small saucepan over medium-low heat. Stir constantly with a spatula for 5-7 minutes. Do not let it boil. Once it feels thick like pudding, pour it straight into the baked pie crust and smooth the top.

- STEP 4: Pour Filling into Crust Pour the hot filling directly into the pre-baked pie crust. Use a spatula to smooth the top evenly.

- STEP 5: Start the Sugar Syrup Let the filling cool while you make the meringue. In a clean saucepan, combine 1 cup sugar and 1/4 cup water. Stir gently over medium heat until sugar dissolves. Stop stirring and let it boil until it reaches 240°F (soft ball stage) on a thermometer, about 4-5 minutes.

- STEP 6: Whip the Egg Whites While syrup is boiling, put the 4 egg whites and cream of tartar in a large clean bowl. Beat with electric mixer until soft peaks form. They should be white and fluffy.

- STEP 7: Combine Syrup and Egg Whites With the mixer running on low, slowly pour the hot sugar syrup down the side of the bowl into the egg whites. Be careful it's hot. Once all syrup is in, turn mixer to high and beat for 5-7 minutes. The bowl should cool down and the meringue should be thick, glossy, and stiff.

- STEP 8: Assemble and Toast Pile the meringue on top of the lemon filling. Use the back of a spoon to make little peaks. Make sure meringue touches the edges of the crust to seal it. Pop it under a hot broiler for 1-2 minutes to toast the peaks brown. Watch carefully so it doesn't burn.

- STEP 9: Finished Pie The meringue tips are golden brown and beautiful. The pie is ready to chill.

- STEP 10: Chill and Serve Refrigerate for at least 3 hours before slicing. This helps the filling set completely.

Notes
Storage Keep in the fridge for up to 2 days. Meringue is best the day it is made. Store uncovered or loosely tented with foil. Do not freeze.
