Key Lime Pie Recipe in The Den Posted May 29, 2018 · Report reply Ingredients - 1 (9 inch) prepared graham cracker crust - 3 cups sweetened condensed milk - ½ cup sour cream - ¾ cup key lime juice - 1 tablespoon grated lime zest Directions 1. Preheat oven to 350 degrees F (175 degrees C) 2. In a medium bowl, combine condensed milk, sour cream, lime juice, and lime rind. Mix well and pour into graham cracker crust. 3. Back in a preheated oven for 5 to 8 minutes, until tiny pinhole bubbles burst on the surface of pie. DO NOT BROWN! Chill pie thoroughly before serving. Garnish with lime slices and whipped cream if desired.