Key Lime Pie

1-8oz. cool whip
1 can sweetened condensed milk
1/3 cup lime juice
2 tsp. lime zest

Beat all ingredients together and put in graham cracker crust. Double recipe for a large pan. Save a little bit of graham crackers and lime zest to sprinkle of top for decoration. You can also put a slice of lime for decoration (slice part of it and twist it)