Place the softened cream cheese into a bowl and blend with a hand mixer (or stand mixer) until smooth. Add the sweetened condensed milk, lemon juice and zest; continue blending until fully combined and completely smooth.
Transfer the filling into the graham crust, smooth the top with an offset spatula and chill until set; about 2 to 4 hours. For crisp, sharp slices, you freeze the pie for 30 minutes or so just before serving.
Top with whipped cream or cool whip and serve chilled.
Notes
How far in advance can this recipe be made?
It's best up to 2 days ahead but will keep for up to 5 days. Cover the lemon pie and store it in the refrigerator.
Can this Lemon Pie be frozen?
Absolutely. Wrap it well and freeze for up to 3 months.