Gather the ingredients. Preheat the broiler to 500 degrees F (260 degrees C).

Beat condensed milk, egg yolks, and lemon juice together in a medium mixing bowl; pour mixture into graham cracker crust.

Beat egg whites with sugar in a separate glass or metal mixing bowl until stiff peaks form. Spread evenly on top of lemon filling.

Brown in preheated broiler just until meringue is set and golden. Keep pie refrigerated.