1 1/2 cups crushed graham crackers
5 tablespoons melted butter
4 tablespoons granulated sugar
3 (14.5 oz) cans sweetened condensed milk
2 drops green food coloring + 1 drop yellow (optional)
1/2 cup sour cream
1 cup key lime juice (or regular lime juice)
2 tablespoons freshly grated lime zest (from about 2 large limes)
Whipped cream or Cool Whip
Extra lime zest or sprinkles
Preheat oven to 350 degrees. Mix crumbled graham crackers, butter and sugar in a 9” spring form pan or a deep dish pie plate and firmly press evenly over bottom and sides of pan. Bake for 8 minutes. Let cool before adding filling.
Meanwhile, combine sweetened condensed milk and food coloring if desired, mixing until totally blended. Add the sour cream, lime juice and lime zest and whisk until thickened and completely incorporated. Pour mixture in to cooled crust and refrigerate 2 hours or until ready to serve.
If desired, just before serving, pipe whipped cream around the edge of the pie (I used Wilton tip 1M) and garnish with some extra lime zest or festive sprinkles of your choice. Or you can just serve with a dollop of whipped cream on top. Refrigerate leftovers.