1 can sweetened condensed milk
1 container Cool Whip
1 container frozen lime juice
graham cracker pie crust or make your own with crushed graham crackers and butter
Use a store-bought one pie crust or make your own in advance by mixing 1 1/2 c of crushed graham crackers with 1/2 c butter. Press into pie pan.
Bake at 350 for 15 minutes. Cool.
Mix together frozen lime juice and milk. Add Cool Whip mix until smooth.
Pour into pie crust and place in freezer overnight.